1. Proteins are made of chains of amino acids joined by peptide bonds. Chains with fewer than 50 units are called peptides, while larger chains have structural or catalytic functions.
2. There are 20 common amino acids that differ in their variable side chains. Amino acids can be neutral, acidic, basic, or polar depending on their side chain properties.
3. The primary structure of a protein is its amino acid sequence. Secondary structures include alpha helices and beta sheets. Tertiary structure describes the overall 3D shape, while quaternary involves interactions of multiple protein molecules.
What is Electrophoresis?
Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field.
This electrokinetic phenomenon was first observed in 1807 by Russian professors Peter Ivanovich Strakhov and Ferdinand Frederic Reuss (Moscow State University), who noticed that the application of a constant electric field caused clay particles dispersed in water to migrate.
Electrophoresis of positively charged particles (cations) is called cataphoresis while electrophoresis of negatively charged particles (anions) is called anaphoresis.
To estimate the concentration of KMnO4 and CuSO4 solutions, colorimetricallyMithil Fal Desai
This document outlines a procedure to estimate the concentration of potassium permanganate (KMnO4) and copper sulfate (CuSO4) solutions using a colorimeter. Standard solutions of varying concentrations of each compound are prepared. The absorbance of each standard solution is measured using different colorimeter filters to select the filter with the highest absorbance. A calibration curve of absorbance versus concentration is plotted for each compound. The absorbance of unknown solutions is then measured and the concentrations are determined using the calibration curves. The procedure aims to estimate the unknown concentrations of KMnO4 and CuSO4 colorimetrically based on the Beer-Lambert law relationship between absorbance and concentration.
Tests for proteins is the tests that are used for determine proteins and indicate it form other dietary fuels , we carried out this tests in our biochemistry lab in college of pharmacy - third stage - university of sulaimani .
Ion exchange chromatography -SlideShareRIZWAN RIZWI
This ppt provide a good knowledge about ion exchange chromatography. I think this is very helpful for you .Here i have tried to explain a best way and simple method so guys you all enjoy this and gain your knowledge. And wish for me to provide more pptx for you all .at the end i want your experience give me suggestion if i made any mistake thank you .
The document discusses High Performance Liquid Chromatography (HPLC). It states that HPLC provides faster separation of compounds compared to other chromatographic techniques due to the use of smaller bead sizes in columns and high pressure pumps. Smaller bead sizes allow for sharper separation but reduce flow rates, which is overcome by applying high pressure. Therefore, HPLC achieves very high resolution and faster separation using smaller bead sizes and high pressure pumps.
Isoelectric focusing electrophoresis- Principle , procedure and applicationsJaskiranKaur72
This document discusses isoelectric focusing (IEF), a technique that separates molecules like proteins based on differences in their isoelectric point (pI). IEF works by placing proteins in an immobilized pH gradient gel and applying an electric field, which causes the proteins to migrate until they reach the pH that matches their pI and become neutrally charged. Common applications of IEF include separating, characterizing, and purifying proteins and peptides, as well as its use in forensic analysis, taxonomy research, and genetic marker typing.
What is Electrophoresis?
Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field.
This electrokinetic phenomenon was first observed in 1807 by Russian professors Peter Ivanovich Strakhov and Ferdinand Frederic Reuss (Moscow State University), who noticed that the application of a constant electric field caused clay particles dispersed in water to migrate.
Electrophoresis of positively charged particles (cations) is called cataphoresis while electrophoresis of negatively charged particles (anions) is called anaphoresis.
To estimate the concentration of KMnO4 and CuSO4 solutions, colorimetricallyMithil Fal Desai
This document outlines a procedure to estimate the concentration of potassium permanganate (KMnO4) and copper sulfate (CuSO4) solutions using a colorimeter. Standard solutions of varying concentrations of each compound are prepared. The absorbance of each standard solution is measured using different colorimeter filters to select the filter with the highest absorbance. A calibration curve of absorbance versus concentration is plotted for each compound. The absorbance of unknown solutions is then measured and the concentrations are determined using the calibration curves. The procedure aims to estimate the unknown concentrations of KMnO4 and CuSO4 colorimetrically based on the Beer-Lambert law relationship between absorbance and concentration.
Tests for proteins is the tests that are used for determine proteins and indicate it form other dietary fuels , we carried out this tests in our biochemistry lab in college of pharmacy - third stage - university of sulaimani .
Ion exchange chromatography -SlideShareRIZWAN RIZWI
This ppt provide a good knowledge about ion exchange chromatography. I think this is very helpful for you .Here i have tried to explain a best way and simple method so guys you all enjoy this and gain your knowledge. And wish for me to provide more pptx for you all .at the end i want your experience give me suggestion if i made any mistake thank you .
The document discusses High Performance Liquid Chromatography (HPLC). It states that HPLC provides faster separation of compounds compared to other chromatographic techniques due to the use of smaller bead sizes in columns and high pressure pumps. Smaller bead sizes allow for sharper separation but reduce flow rates, which is overcome by applying high pressure. Therefore, HPLC achieves very high resolution and faster separation using smaller bead sizes and high pressure pumps.
Isoelectric focusing electrophoresis- Principle , procedure and applicationsJaskiranKaur72
This document discusses isoelectric focusing (IEF), a technique that separates molecules like proteins based on differences in their isoelectric point (pI). IEF works by placing proteins in an immobilized pH gradient gel and applying an electric field, which causes the proteins to migrate until they reach the pH that matches their pI and become neutrally charged. Common applications of IEF include separating, characterizing, and purifying proteins and peptides, as well as its use in forensic analysis, taxonomy research, and genetic marker typing.
This document discusses chiral chromatography and methods for chiral separation. It begins with introducing key concepts such as isomers, chirality, enantiomers, and diastereomers. It then discusses various types of chiral chromatography techniques including chiral HPLC. Chiral HPLC uses chiral stationary phases or chiral mobile phase additives to achieve separation of enantiomers through formation of transient diastereomers on the column. Key factors that influence chiral separations by HPLC are discussed such as temperature, three-point interactions, and types of chiral columns.
Blood group substances biochemistry presentation.
this presentation helps in the better understanding of the topic h substances which are the primitive substances that help in the formation of the ABO blood groups.
This document discusses vertical gel electrophoresis. It begins with an introduction explaining that gel electrophoresis separates macromolecules like DNA, RNA, and proteins based on size and charge. It then describes the principles of vertical gel electrophoresis, different types of polyacrylamide gel electrophoresis (PAGE), and two-dimensional PAGE. Applications include estimating molecular weights, identifying protein subunits, and purification. Advantages are stable gels and good resolution of small molecules, while disadvantages include more difficult preparation than agarose gels.
Electrophoresis is a technique used to separate charged molecules like proteins and nucleic acids. It works by applying an electric field to move molecules through a buffer solution or gel based on their size and charge. There are several types of electrophoresis that use different supporting media like agarose gel, polyacrylamide gel, cellulose acetate, or paper to separate molecules. Factors like pH, buffer composition, strength of electric field, and temperature influence how molecules separate during electrophoresis. It has various applications in biomedical research and clinical diagnostics.
Electrophoresis is a laboratory technique used to separate DNA, RNA, or protein molecules based on their size and electrical charge. An electric current is used to move molecules to be separated through a gel. Pores in the gel work like a sieve, allowing smaller molecules to move faster than larger molecules.
Electrophoresis is a technique used to separate charged molecules like proteins and DNA. It works by applying an electric current which causes the molecules to migrate through a buffer or gel at different rates depending on their size and charge. The document discusses the principles of electrophoresis, different types of electrophoresis like agarose gel electrophoresis and polyacrylamide gel electrophoresis (PAGE), and factors that influence molecule migration like pH, molecular weight, and net charge.
This document discusses amperometric titration, which is a quantitative analysis technique where the equivalence point of a titration is determined by measuring the electric current produced by the titration reaction. It involves using a working electrode to apply an electrolytic potential to a solution containing an analyte and a conductive buffer. As a titrant is added that reacts with the analyte, the concentration and resulting current are measured. A plot of current vs titrant volume produces a straight line, with the equivalence point indicated by a change in slope when excess titrant is reduced at the electrode. Amperometric titrations offer selectivity advantages over other techniques.
The document discusses the determination of the primary structure of proteins. It begins by explaining that proteins are composed of amino acid residues linked by peptide bonds to form a polypeptide chain. The primary structure refers to the specific sequence of amino acids in this chain. Mass spectrometry and tandem mass spectrometry techniques are used to analyze protein fragments obtained through enzymatic or chemical cleavage to determine the amino acid sequence and thereby elucidate the primary structure.
This document provides an overview of isoelectric focusing (IEF). IEF separates proteins in a gel according to their isoelectric point (pI), which is the pH at which a protein has no net charge. During IEF, proteins migrate through an immobilized pH gradient generated by ampholytes until they reach the pH that matches their pI and cease moving. IEF provides high resolution separation and is useful for research applications such as taxonomy, cytology, and immunology.
Transcription is the process of converting DNA into mRNA. It involves two main steps - formation of pre-mRNA using RNA polymerase and editing of pre-mRNA into mRNA through splicing. During transcription, RNA polymerase binds to DNA and synthesizes pre-mRNA on the template strand. The pre-mRNA then undergoes splicing to remove introns, forming mRNA. The mRNA is transported out of the nucleus where it directs protein synthesis through translation. Translation involves three stages - initiation, elongation, and termination, using ribosomes and tRNA to link amino acids together into a polypeptide chain based on the mRNA codons.
Ion exchange chromatography and gel permeation chromatography are discussed. Ion exchange chromatography separates molecules based on ionic interactions between charged molecules and oppositely charged sites on a stationary phase. Gel permeation chromatography separates molecules by size as larger molecules pass through porous beads faster than smaller molecules. Both techniques are useful for separating and analyzing biomolecules and polymers.
This document provides an overview of electrophoresis, including basic concepts, instrumentation, techniques, types, and applications. It discusses how electrophoresis works, factors that influence particle migration, and common buffer solutions and support media used. It also describes techniques for sample preparation, separation, staining, detection and quantification. Finally, it outlines several types of electrophoresis like zone electrophoresis, slab gel electrophoresis, disc electrophoresis, and isoelectric focusing electrophoresis. In summary, the document is a comprehensive guide to electrophoresis fundamentals and methodology.
Fractional distillation uses differences in boiling points to separate mixtures of miscible liquids into their component parts. It works by heating a liquid mixture so its vapors rise up a fractionating column, where they condense on trays and run back down, with the most volatile vapors reaching the top. Only the vapors that remain gaseous to the top exit through a condenser to be collected as a distilled liquid. Fractional distillation is used to purify organic compounds and separate substances like acetone and water and is effective though it can be energy intensive and contribute to pollution.
For B.Pharm 4th sem student
The isomerism which occurs due to difference of the positions of the substituents about a double bond or a ring due to restricted rotation is called geometric isomerism.
They do not rotate the plane of polarised light (unless they also happen to be chiral), and do not have identical properties.
Ion exchange chromatography is a process that separates ions and polar molecules based on their charge using an ion exchange resin. There are two main types of ion exchange - cation exchange which uses a negatively charged resin to adsorb positively charged proteins, and anion exchange which uses a positively charged resin to adsorb negatively charged proteins. The process involves equilibrating the resin, applying the sample mixture, then eluting the bound molecules by altering conditions such as pH or ionic strength to cause differential elution. Ion exchange chromatography is useful for purifying proteins and other charged biomolecules.
INTRODUCTION, DEFINATION OF ELECTROPHORESIS, ELECTROPHORESIS PRINCIPLE, TYPES OF ELECTROPHORESIS, FREE ELECTROPHORESIS, ZONE ELECTROPHORESIS,PAPER ELECTROPHORESIS, WORKING OF PAPER ELECTROPHORESIS, PROCEDURE FOR PAPER ELECTROPHORESIS, VISUALISATION, FACTORS AFFECTING SEPARATION OF MOLECULES, APPLICATIONS, working of paper electrophoresis ,procedure for paper electrophoresis ,visualisation ,factors affecting separation of molecules ,applications ,forensics ,dna fingerprinting ,molecular biology ,microbiology information about the organisms ,biochemistry mapping of cellular components ,paper electrophoresis is also used in study of sic ,hemoglobin abnormalities ,separation of blood clotting factors ,serum plasma proteins from blood sample ,used in separation and identification of alkaloids ,used for testing water samples ,toxicity of water ,drug industry to determine presence of illelgal drUGS
This presentation explains about the Immunoassay ,radio immuno assay, definition, types, Principle , procedure, steps involved ,advantages ,disadvantages ,Application, RIA in insulin. RIA in Digitalis drug ligand etc....
ENZYME INHIBITION THE MOST IMPORTANT TOPIC FOR BIOLOGY AS WELL AS CHEMISTRY PEOPLES. WE HAVE HERE COVERED FOR THE PHARMA STUDENTS THIS WILL MAKE THEM EASY AS WE ARE COLLECTED ALL THE DATA A SINGLE PLACE WICH COVERS ALL THE COTENTS.
This document discusses principles of protein structure, including primary, secondary, and supersecondary structure. It covers the following key points:
- Primary structure refers to the amino acid sequence of a protein. There are 20 common amino acids that make up protein sequences.
- Secondary structure includes common elements like alpha helices and beta sheets. Alpha helices are right-handed coils stabilized by hydrogen bonds between amino acids four positions apart in the sequence. Beta sheets consist of beta strands connected laterally or anti-parallel by hydrogen bonds.
- Supersecondary structure refers to recurrent structural motifs formed by combinations of secondary structure elements, like beta-alpha-beta motifs or helix-loop-helix motifs. Larger domains
Detailed Amino acid structure, Zwitter ions, acid base properties of Amino acids, Chirality, L and D forms of amino acids,standard and non standard amino acids, Essential and non essential amino acids,Learn all amino acids, their properties in detail,methods to quantify amino acids
This document discusses chiral chromatography and methods for chiral separation. It begins with introducing key concepts such as isomers, chirality, enantiomers, and diastereomers. It then discusses various types of chiral chromatography techniques including chiral HPLC. Chiral HPLC uses chiral stationary phases or chiral mobile phase additives to achieve separation of enantiomers through formation of transient diastereomers on the column. Key factors that influence chiral separations by HPLC are discussed such as temperature, three-point interactions, and types of chiral columns.
Blood group substances biochemistry presentation.
this presentation helps in the better understanding of the topic h substances which are the primitive substances that help in the formation of the ABO blood groups.
This document discusses vertical gel electrophoresis. It begins with an introduction explaining that gel electrophoresis separates macromolecules like DNA, RNA, and proteins based on size and charge. It then describes the principles of vertical gel electrophoresis, different types of polyacrylamide gel electrophoresis (PAGE), and two-dimensional PAGE. Applications include estimating molecular weights, identifying protein subunits, and purification. Advantages are stable gels and good resolution of small molecules, while disadvantages include more difficult preparation than agarose gels.
Electrophoresis is a technique used to separate charged molecules like proteins and nucleic acids. It works by applying an electric field to move molecules through a buffer solution or gel based on their size and charge. There are several types of electrophoresis that use different supporting media like agarose gel, polyacrylamide gel, cellulose acetate, or paper to separate molecules. Factors like pH, buffer composition, strength of electric field, and temperature influence how molecules separate during electrophoresis. It has various applications in biomedical research and clinical diagnostics.
Electrophoresis is a laboratory technique used to separate DNA, RNA, or protein molecules based on their size and electrical charge. An electric current is used to move molecules to be separated through a gel. Pores in the gel work like a sieve, allowing smaller molecules to move faster than larger molecules.
Electrophoresis is a technique used to separate charged molecules like proteins and DNA. It works by applying an electric current which causes the molecules to migrate through a buffer or gel at different rates depending on their size and charge. The document discusses the principles of electrophoresis, different types of electrophoresis like agarose gel electrophoresis and polyacrylamide gel electrophoresis (PAGE), and factors that influence molecule migration like pH, molecular weight, and net charge.
This document discusses amperometric titration, which is a quantitative analysis technique where the equivalence point of a titration is determined by measuring the electric current produced by the titration reaction. It involves using a working electrode to apply an electrolytic potential to a solution containing an analyte and a conductive buffer. As a titrant is added that reacts with the analyte, the concentration and resulting current are measured. A plot of current vs titrant volume produces a straight line, with the equivalence point indicated by a change in slope when excess titrant is reduced at the electrode. Amperometric titrations offer selectivity advantages over other techniques.
The document discusses the determination of the primary structure of proteins. It begins by explaining that proteins are composed of amino acid residues linked by peptide bonds to form a polypeptide chain. The primary structure refers to the specific sequence of amino acids in this chain. Mass spectrometry and tandem mass spectrometry techniques are used to analyze protein fragments obtained through enzymatic or chemical cleavage to determine the amino acid sequence and thereby elucidate the primary structure.
This document provides an overview of isoelectric focusing (IEF). IEF separates proteins in a gel according to their isoelectric point (pI), which is the pH at which a protein has no net charge. During IEF, proteins migrate through an immobilized pH gradient generated by ampholytes until they reach the pH that matches their pI and cease moving. IEF provides high resolution separation and is useful for research applications such as taxonomy, cytology, and immunology.
Transcription is the process of converting DNA into mRNA. It involves two main steps - formation of pre-mRNA using RNA polymerase and editing of pre-mRNA into mRNA through splicing. During transcription, RNA polymerase binds to DNA and synthesizes pre-mRNA on the template strand. The pre-mRNA then undergoes splicing to remove introns, forming mRNA. The mRNA is transported out of the nucleus where it directs protein synthesis through translation. Translation involves three stages - initiation, elongation, and termination, using ribosomes and tRNA to link amino acids together into a polypeptide chain based on the mRNA codons.
Ion exchange chromatography and gel permeation chromatography are discussed. Ion exchange chromatography separates molecules based on ionic interactions between charged molecules and oppositely charged sites on a stationary phase. Gel permeation chromatography separates molecules by size as larger molecules pass through porous beads faster than smaller molecules. Both techniques are useful for separating and analyzing biomolecules and polymers.
This document provides an overview of electrophoresis, including basic concepts, instrumentation, techniques, types, and applications. It discusses how electrophoresis works, factors that influence particle migration, and common buffer solutions and support media used. It also describes techniques for sample preparation, separation, staining, detection and quantification. Finally, it outlines several types of electrophoresis like zone electrophoresis, slab gel electrophoresis, disc electrophoresis, and isoelectric focusing electrophoresis. In summary, the document is a comprehensive guide to electrophoresis fundamentals and methodology.
Fractional distillation uses differences in boiling points to separate mixtures of miscible liquids into their component parts. It works by heating a liquid mixture so its vapors rise up a fractionating column, where they condense on trays and run back down, with the most volatile vapors reaching the top. Only the vapors that remain gaseous to the top exit through a condenser to be collected as a distilled liquid. Fractional distillation is used to purify organic compounds and separate substances like acetone and water and is effective though it can be energy intensive and contribute to pollution.
For B.Pharm 4th sem student
The isomerism which occurs due to difference of the positions of the substituents about a double bond or a ring due to restricted rotation is called geometric isomerism.
They do not rotate the plane of polarised light (unless they also happen to be chiral), and do not have identical properties.
Ion exchange chromatography is a process that separates ions and polar molecules based on their charge using an ion exchange resin. There are two main types of ion exchange - cation exchange which uses a negatively charged resin to adsorb positively charged proteins, and anion exchange which uses a positively charged resin to adsorb negatively charged proteins. The process involves equilibrating the resin, applying the sample mixture, then eluting the bound molecules by altering conditions such as pH or ionic strength to cause differential elution. Ion exchange chromatography is useful for purifying proteins and other charged biomolecules.
INTRODUCTION, DEFINATION OF ELECTROPHORESIS, ELECTROPHORESIS PRINCIPLE, TYPES OF ELECTROPHORESIS, FREE ELECTROPHORESIS, ZONE ELECTROPHORESIS,PAPER ELECTROPHORESIS, WORKING OF PAPER ELECTROPHORESIS, PROCEDURE FOR PAPER ELECTROPHORESIS, VISUALISATION, FACTORS AFFECTING SEPARATION OF MOLECULES, APPLICATIONS, working of paper electrophoresis ,procedure for paper electrophoresis ,visualisation ,factors affecting separation of molecules ,applications ,forensics ,dna fingerprinting ,molecular biology ,microbiology information about the organisms ,biochemistry mapping of cellular components ,paper electrophoresis is also used in study of sic ,hemoglobin abnormalities ,separation of blood clotting factors ,serum plasma proteins from blood sample ,used in separation and identification of alkaloids ,used for testing water samples ,toxicity of water ,drug industry to determine presence of illelgal drUGS
This presentation explains about the Immunoassay ,radio immuno assay, definition, types, Principle , procedure, steps involved ,advantages ,disadvantages ,Application, RIA in insulin. RIA in Digitalis drug ligand etc....
ENZYME INHIBITION THE MOST IMPORTANT TOPIC FOR BIOLOGY AS WELL AS CHEMISTRY PEOPLES. WE HAVE HERE COVERED FOR THE PHARMA STUDENTS THIS WILL MAKE THEM EASY AS WE ARE COLLECTED ALL THE DATA A SINGLE PLACE WICH COVERS ALL THE COTENTS.
This document discusses principles of protein structure, including primary, secondary, and supersecondary structure. It covers the following key points:
- Primary structure refers to the amino acid sequence of a protein. There are 20 common amino acids that make up protein sequences.
- Secondary structure includes common elements like alpha helices and beta sheets. Alpha helices are right-handed coils stabilized by hydrogen bonds between amino acids four positions apart in the sequence. Beta sheets consist of beta strands connected laterally or anti-parallel by hydrogen bonds.
- Supersecondary structure refers to recurrent structural motifs formed by combinations of secondary structure elements, like beta-alpha-beta motifs or helix-loop-helix motifs. Larger domains
Detailed Amino acid structure, Zwitter ions, acid base properties of Amino acids, Chirality, L and D forms of amino acids,standard and non standard amino acids, Essential and non essential amino acids,Learn all amino acids, their properties in detail,methods to quantify amino acids
Amino acids are organic compounds that contain an amino group and a carboxyl group. There are over 300 amino acids found in nature, but only 20 are used as building blocks of proteins in the body. Each amino acid contains an alpha carbon atom bonded to an amino group, a carboxyl group, a hydrogen atom, and a unique side chain. At physiological pH, amino acids exist as zwitterions with both positive and negative charges. Amino acids join together via peptide bonds to form polypeptides and proteins. The 20 standard amino acids are classified based on properties like polarity and acidity of their side chains. Amino acids and proteins are essential for building body tissues and important biomolecules like enzymes, hormones
There are 20 common amino acids that serve as the building blocks of proteins. Amino acids contain an amino group, a carboxyl group, and a variable side chain. They join together through peptide bonds to form polypeptides and proteins. Ten of the 20 amino acids are considered essential and must be obtained through diet as humans cannot synthesize them. Proteins perform a wide variety of important functions in the body.
Principle of protein structure and functionAsheesh Pandey
The document discusses principles of protein structure, including primary, secondary, and tertiary structure. It covers amino acids and their properties, peptide bonds, and common structural elements like the alpha helix. Specifically, it defines primary structure as the amino acid sequence, discusses the 20 common amino acids and their characteristics like chirality. It also covers dihedral angles, Ramachandran plots, common secondary structures like the alpha helix and their properties, including hydrogen bonding patterns and characteristic phi and psi angles.
The document discusses amino acids, the building blocks of proteins. It describes the basic structure of an amino acid, which consists of a central carbon atom bonded to an amino group, carboxyl group, hydrogen atom, and variable R group. The 20 standard amino acids that make up proteins are specified. The amino acids are classified based on properties of their R groups, including polarity and charge. The document also discusses how amino acids join together via peptide bonds to form polypeptides and proteins, and the four levels of protein structure that determine a protein's function.
Amino acids are the building blocks of proteins. There are about 300 amino acids that occur in nature, but only 20 are used to build proteins. Each amino acid contains an amino group, a carboxyl group, a hydrogen atom, and a side chain that gives each amino acid its unique properties. At physiological pH, amino acids exist as zwitterions with both a positive and negative charge. The order and types of amino acids linked together determines a protein's structure and function. Amino acids can be classified based on their structure, side chain properties, nutritional needs, and metabolic fate.
This document summarizes key information about amino acids and proteins. It discusses the classification of the 20 standard amino acids found in proteins into seven groups based on their structure. It also describes the essential and non-essential amino acids, and how amino acids are classified based on their polarity and metabolic fate. The document outlines important chemical and physical properties of amino acids, and how they combine through peptide bonds to form peptides and proteins.
The document discusses amino acids and peptides. It provides information on:
1. The structure and properties of the 20 common amino acids found in proteins, including their ionization states and isoelectric points.
2. How amino acids can act as acids or bases depending on pH due to ionization of their carboxyl and amino groups.
3. The formation of peptide bonds between amino acids and how this leads to the creation of polypeptides and proteins of physiological significance.
Amino acids are the building blocks of proteins. There are 20 standard amino acids that make up proteins. Amino acids have a general structure that includes an amino group, a carboxyl group, and a side chain. They can be classified based on their structure, side chain properties, nutritional requirements, and metabolic fate. Common properties of amino acids include being crystalline solids, existing as zwitterions with an isoelectric point, and having chirality with L and D isomers. Amino acids undergo various reactions due to their amino, carboxyl, and side chain groups.
This presentation the chemical structure of natural amino acids. It also classifies amino acids according to several criteria e.g., structure (aliphatic, aromatic, and heterocyclic amino acids), reaction (Neutral, acidic and basic amino acids), polarity (polar and nonpolar amino acids), and metabolic fate ( glucogenic, ketogenic and glucoketogenic amino acids)
This document provides information on protein and amino acid chemistry. It discusses that proteins are polymers of amino acids joined by peptide bonds. The 20 common amino acids found in humans are the building blocks of proteins. Amino acids contain common structural features including an amino group, a carboxyl group, and a side chain. They can be classified based on the structure of their side chains. Peptide bonds form when the carboxyl group of one amino acid reacts with the amino group of another, linking the amino acids together. Several important biological peptides are discussed such as glutathione, insulin, and oxytocin.
The document discusses protein structure and function. It covers the following key points:
1) Amino acids are the building blocks of proteins. There are 20 common amino acids that make up proteins through peptide bond formation.
2) Protein structure is hierarchical, consisting of primary, secondary, tertiary, and sometimes quaternary levels. Secondary structure includes alpha helices and beta sheets formed by hydrogen bonding. Tertiary structure is determined by interactions between amino acid side chains.
3) Proteins are classified based on solubility, composition, and derivation. Simple proteins hydrolyze to amino acids, while conjugated proteins also contain non-protein components like lipids, sugars, or metals. Derived proteins result from
This document discusses amino acids, which are the building blocks of proteins. It defines amino acids and their basic structure, which includes an amino group, carboxyl group, and side chain. The document then classifies amino acids according to their side chains and discusses their optical, acid-base, and buffer properties. It also distinguishes between standard and non-standard amino acids, and essential vs non-essential amino acids which must be obtained through diet.
This document provides an overview of protein structure and function. It discusses the four levels of protein structure from primary to quaternary structure. The 20 standard amino acids that serve as building blocks of proteins are described in terms of their chemical and physical properties. Amino acids contain both polar and non-polar side chains that influence protein structure and function. Key concepts covered include protein folding, the zwitterionic nature of amino acids, and interactions like disulfide bonds and hydrophobic effects that stabilize protein tertiary structure.
This document discusses amino acids, which are organic compounds that contain amino and carboxyl groups and form proteins by binding together via peptide bonds. Amino acids are classified based on their structure, polarity, and nutritional requirements. There are essential and non-essential amino acids. Amino acids can undergo reactions like decarboxylation, amide formation, transamination, and oxidative deamination. They have amphoteric properties due to acidic and basic groups and exist as zwitterions at their isoelectric pH. Peptide bonds between amino acids are planar and rigid.
The document discusses amino acids and their properties. It introduces the 20 standard amino acids that make up mammalian proteins, as well as 2 additional amino acids coded by DNA in a non-standard manner. Amino acids have different structures depending on their variable R groups, and can be classified based on properties like polarity, acidity, and charge. Peptides are formed from amino acids joined by peptide bonds. The peptide bond gives peptides some rigidity and planar structure. Important peptides include glutathione, bradykinin, and peptide hormones. The primary structure of a protein refers to the specific sequence of amino acid residues that make it up.
Amino acids, peptides and proteins: Structure and naming of amino acidsshaikmgu
This document discusses the structures of proteins at different levels:
1) Primary structure is the amino acid sequence in the polypeptide chain.
2) Secondary structures include alpha helices and beta pleated sheets formed by hydrogen bonding between amino acids in the chain.
3) Tertiary structure is the overall 3D shape of a protein determined by interactions between amino acid side chains like disulfide bonds, ionic bonds, and hydrophobic interactions.
4) Quaternary structure refers to multi-subunit proteins formed by interactions between two or more polypeptide chains.
This document discusses proteins and amino acids. It begins by introducing proteins, their composition of amino acids, and their various functions in the body. It then describes the 20 standard amino acids that make up proteins, including their structures and classifications. The document discusses how amino acids join together through peptide bonds to form polypeptides and proteins. It also covers the levels of protein structure: primary, secondary, tertiary, and quaternary. In addition, it categorizes amino acids as essential or non-essential based on whether the human body can synthesize them.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Thinking of getting a dog? Be aware that breeds like Pit Bulls, Rottweilers, and German Shepherds can be loyal and dangerous. Proper training and socialization are crucial to preventing aggressive behaviors. Ensure safety by understanding their needs and always supervising interactions. Stay safe, and enjoy your furry friends!
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
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Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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2. 2
Proteins – Amides from Amino Acids
• Amino acids contain a basic amino group and an
acidic carboxyl group
• Joined as amides between the NH2 of one amino
acid and the CO2H the next
• Chains with fewer than 50 units are called peptides
• Proteins: large chains that have structural or catalytic
functions in biology
3. 3
Structures of Amino Acids
• In neutral solution, the COOH is ionized and the
NH2 is protonated
• The resulting structures have “+” and “-” charges
(a dipolar ion, or zwitterion)
• They are like ionic salts in solution
4. 4
The Common Amino Acids
• 20 amino acids form amides in proteins
• All are α-amino acids - the amino and carboxyl
are connected to the same C
• They differ by the other substituent attached to
the α carbon, called the side chain, with H as the
fourth substituent except for proline
• Proline, is a five-membered secondary amine,
with N and the α C part of a five-membered ring
5. 5
The Structure of Amino Acids
H2N
C
CO2H
R
H
R – can be a series of functional groups
6. 6
Abbreviations and Codes
Alanine A, Ala
Arginine R, Arg
Asparagine N, Asn
Aspartic acid D, Asp
Cysteine C, Cys
Glutamine Q, Gln
Glutamic Acid E, Glu
Glycine G, Gly
Histidine H, His
Isoleucine I, Ile
Leucine L, Leu
Lysine K, Lys
Methionine M, Met
Phenylalanine F, Phe
Proline P, Pro
Serine S, Ser
Threonine T, Thr
Tryptophan W, Trp
Tyrosine Y, Tyr
Valine V, Val
7. 7
Learning the Names and Codes
• The names are not systematic so you learn them by
using them (They become your friends)
• One letter codes – learn them too
– If only one amino acid begins with that letter, use it (Cys,
His, Ile, Met, Ser, Val)
– If more than one begins with that letter, the more common
one uses the letter (Ala, Gly, Leu, Pro, Thr)
– For the others, some are phonetic: Fenylalanine, aRginine,
tYrosine
– Tryp has a double ring, hence W
– Amides have letters from the middle of the alphabet (Q –
Think of “Qtamine” for glutamine; asparagine -contains N
– “Acid” ends in D and E follows (smallest is first: aspartic
aciD, Glutamic acid E)
8. 8
Neutral Hydrocarbon Side Chains
H2N CHC
CH3
OH
O
H2N CHC
CH
OH
O
CH3
CH2
CH3
H2N CHC
CH2
OH
O
HN
C OH
O
H2N CHC
H
OH
O
H2N CHC
CH
OH
O
CH3
CH3
Glyciene
Phenylalanine
Isoleuciene
Valine
Proline
Alanine
H2N CHC
CH2
OH
O
CHCH3
CH3
Leuciene
9. 9
-OH, SH (Nucleophiles) and -S-CH3
Cysteine C, Cys
Methionine M, Met
Serine S, Ser
Threonine T, Thr
Tyrosine Y, Tyr
H2N CHC
CH2
OH
O
OH
H2N CHC
CH
OH
O
OH
CH3
H2N CHC
CH2
OH
O
OH
H2N CHC
CH2
OH
O
SH
Serine
Threonine
Tyrosine
Cysteine
Methionine
H2N CHC
CH2
OH
O
CH2
S
CH3
10. 10
Acids and Amides
Aspartic acid D, Asp
Glutamic Acid E, Glu
Asparagine N, Asn
Glutamine Q, Gln
H2N CHC
CH2
OH
O
CH2
C
OH
O
H2N CHC
CH2
OH
O
CH2
C
NH2
O
H2N CHC
CH2
OH
O
C
OH
O
H2N CHC
CH2
OH
O
C
NH2
O
Glutamic Acid
Glutamine
Aspartic Acid Asparagine
11. 11
Amines
Arginine R, Arg
Histidine H, His
Lysine K, Lys
Tryptophan W, Trp
H2N CHC
CH2
OH
O
CH2
CH2
CH2
NH2
H2N CHC
CH2
OH
O
N
NH
H2N CHC
CH2
OH
O
CH2
CH2
NH
C
NH2
NH
H2N CHC
CH2
OH
O
HN
Tryptophan
Arginine
Lysine Histidine
12. 12
Chirality of Amino Acids
• Glycine, 2-amino-acetic acid, is achiral
• In all the others, the α carbons of the amino
acids are centers of chirality
• The stereochemical reference for amino acids is
the Fischer projection of L-serine
• Proteins are derived exclusively from L-amino
acids
13. 13
Types of side chains
• Neutral: Fifteen of the twenty have neutral side
chains
• Acidic Amino Acids: Asp and Glu have a second
COOH and are acidic
• Basic Amino Acids: Lys, Arg, His have additional
basic amino groups side chains (the N in
tryptophan is a very weak base)
• Polar Amino Acids: Cys, Ser, Tyr (OH and SH)
are weak acids that are good nucleophiles
14. 14
Notes on Histidine
• Contains an imidazole ring that is partially protonated
in neutral solution
• Only the pyridine-like, doubly bonded nitrogen in
histidine is basic. The pyrrole-like singly bonded
nitrogen is nonbasic because its lone pair of electrons
is part of the 6 π electron aromatic imidazole ring (see
Section 24.4).
15. 15
Essential Amino Acids
• All 20 of the amino acids are necessary for protein synthesis
• Humans can synthesize only 10 of the 20
• The other 10 must be obtained from food
16. 16
Isoelectric Points
• In acidic solution, the carboxylate and amine are
in their conjugate acid forms, an overall cation
• In basic solution, the groups are in their base
forms, an overall anion
• In neutral solution cation and anion forms are
present
• This pH where the overall charge is 0 is the
isoelectric point, pI
17. 17
pI Depends on Side Chain
• The 15 amino acids thiol, hydroxyl groups or
pure hydrocarbon side chains have pI = 5.0 to
6.5 (average of the pKa’s)
• D and E have acidic side chains and a lower pI
• H, R, K have basic side chains and higher pI
18. 18
Electrophoresis
• Proteins have an overall pI that depends on the
net acidity/basicity of the side chains
• The differences in pI can be used for separating
proteins on a solid phase permeated with liquid
• Different amino acids migrate at different rates,
depending on their isoelectric points and on the
pH of the aqueous buffer
19. 19
Titration Curves of Amino Acids
• If pKa values for an amino acid are known the
fractions of each protonation state can be
calculated (Henderson-Hasselbach Equation)
• pH = pKa – log [A-
]/[HA]
• This permits a titration curve to be calculated or
pKa to be determined from a titration curve
21. 21
Synthesis of Amino Acids
• Bromination of a carboxylic acid by treatment
with Br2 and PBr3 (Section 22.4) then use NH3 or
phthalimide (24.6) to displace Br
22. 22
The Amidomalonate Synthesis
• Based on malonic ester synthesis (see 22.8).
• Convert diethyl acetamidomalonate into enolate
ion with base, followed by alkylation with a
primary alkyl halide
• Hydrolysis of the amide protecting group and the
esters and decarboxylation yields an α-amino
23. 23
Reductive Amination of α-Keto
Acids
• Reaction of an α-keto acid with NH3 and a
reducing agent produces an α-amino acid
24. 24
Enantioselective Synthesis of
Amino Acids
• Amino acids (except glycine) are chiral and pure
enantiomers are required for any protein or peptide
synthesis
• Resolution of racemic mixtures is inherently
ineffecient since at least half the material is
discarded
• An efficient alternative is enantioselective synthesis
25. 25
Chemical Resolution of R,S Amino
Acids
• Convert the amino group into an amide and
react with a chiral amine to form diastereomeric
salts
• Salts are separated and converted back to the
amino acid by hydrolysis of the amide
26. 26
Enzymic Resolution
• Enzymes selectively catalyze the hydrolysis of
amides formed from an L amino acid (S chirality
center)
27. 27
Enantioselective Synthesis of
Amino Acids
• Chiral reaction catalyst creates diastereomeric
transition states that lead to an excess of one
enantiomeric product
• Hydrogenation of a Z enamido acid with a chiral
hydrogenation catalyst produces S enantiomer
selectively
28. 28
Peptides and Proteins
• Proteins and peptides are amino acid polymers in
which the individual amino acid units, called residues,
are linked together by amide bonds, or peptide bonds
• An amino group from one residue forms an amide
bond with the carboxyl of a second residue
29. 29
Peptide Linkages
• Two dipeptides can result from reaction between A
and S, depending on which COOH reacts with which
NH2 we get AS or SA
• The long, repetitive sequence of NCHCO
atoms that make up a continuous chain is called the
protein’s backbone
• Peptides are always written with the N-terminal amino
acid (the one with the free NH2 group) on the left and
the C-terminal amino acid (the one with the free
CO2H group) on the right
• Alanylserine is abbreviated Ala-Ser (or A-S), and
serylalanine is abbreviated Ser-Ala (or S-A)
30. 30
Covalent Bonding in Peptides
• The amide bond that links different amino acids
together in peptides is no different from any
other amide bond (see Section 24.4). Amide
nitrogens are nonbasic because their unshared
electron pair is delocalized by interaction with
the carbonyl group. This overlap of the nitrogen
p orbital with the π orbitals of the carbonyl group
imparts a certain amount of double-bond
character to the C–N bond and restricts rotation
around it. The amide bond is therefore planar,
and the N–H is oriented 180° to the C=O.
32. 32
Disulfides
• Thiols in adjacent chains can form a disulfide RS–SR
through spontaneous oxidation
• A disulfide bond between cysteine residues in different
peptide chains links the otherwise separate chains
together, while a disulfide bond between cysteine
residues in the same chain forms a loop
33. 33
Structure Determination of Peptides:
Amino Acid Analysis
• The sequence of amino acids in a pure protein is
specified genetically
• If a protein is isolated it can be analyzed for its
sequence
• The composition of amino acids can be obtained
by automated chromatography and quantitative
measurement of eluted materials using a
reaction with ninhydrin that produces an intense
purple color
35. 35
Peptide Sequencing: The
Edman Degradation
• The Edman degradation cleaves amino acids
one at a time from the N-terminus and forms a
detectable, separable derivative for each amino
acid
36. 36
Peptide Sequencing: C-Terminal
Residue Determination
• Carboxypeptidase enzymes cleave the C-
terminal amide bond
• Analysis determines the appearance of the first
free amino acid, which must be at the carboxy
terminus of the peptide
37. 37
Peptide Synthesis
• Peptide synthesis requires that different amide bonds
must be formed in a desired sequence
• The growing chain is protected at the carboxyl
terminal and added amino acids are N-protected
• After peptide bond formation, N-protection is removed
38. 38
Carboxyl Protecting Groups
• Usually converted into methyl or benzyl esters
• Removed by mild hydrolysis with aqueous
NaOH
• Benzyl esters are cleaved by catalytic
hydrogenolysis of the weak benzylic C–O bond
39. 39
Amino Group Protection
• An amide that is less stable than the protein
amide is formed and then removed
• The tert-butoxycarbonyl amide (BOC) protecting
group is introduced with di-tert-butyl dicarbonate
• Removed by brief treatment with trifluoroacetic
acid
40. 40
Peptide Coupling
• Amides are formed by
treating a mixture of an acid
and amine with
dicyclohexylcarbodiimide
(DCC)
42. 42
Automated Peptide Synthesis: The
Merrifield Solid-Phase Technique
• Peptides are connected to beads of
polystyrene, reacted, cycled and cleaved at the
end
43. 43
Automated Synthesis
• The solid-phase technique has been automated,
and computer-controlled peptide synthesizers
are available for automatically repeating the
coupling and deprotection steps with different
amino acids
Applied Biosystems®
Synthesizer
44. 44
Protein Classification
• Simple proteins yield only amino acids on hydrolysis
• Conjugated proteins, which are much more common
than simple proteins, yield other compounds such as
carbohydrates, fats, or nucleic acids in addition to amino
acids on hydrolysis.
• Fibrous proteins consist of polypeptide chains arranged
side by side in long filaments
• Globular proteins are coiled into compact, roughly
spherical shapes
• Most enzymes are globular proteins
46. 46
Protein Structure
• The primary structure of a protein is simply the
amino acid sequence.
• The secondary structure of a protein describes
how segments of the peptide backbone orient
into a regular pattern.
• The tertiary structure describes how the entire
protein molecule coils into an overall three-
dimensional shape.
• The quaternary structure describes how different
protein molecules come together to yield large
aggregate structures
47. 47
α-Keratin
• A fibrous structural protein coiled into a right-
handed helical secondary structure, α-helix
stabilized by H-bondsb between amide N–H
groups and C=O groups four residues away a-
helical segments in their chains
48. 48
Fibroin
• Fibroin has a secondary structure called a
β-pleated sheet in which polypeptide
chains line up in a parallel arrangement
held together by hydrogen bonds between
chains
49. 49
Myoglobin
• Myoglobin is a small globular protein containing
153 amino acid residues in a single chain
• 8 helical segments connected by bends to form
a compact, nearly spherical, tertiary structure
50. 50
Internal and External Forces
• Acidic or basic amino acids with charged side chains
congregate on the exterior of the protein where they can
be solvated by water
• Amino acids with neutral, nonpolar side chains
congregate on the hydrocarbon-like interior of a protein
molecule
• Also important for stabilizing a protein's tertiary structure
are the formation of disulfide bridges between cysteine
residues, the formation of hydrogen bonds between
nearby amino acid residues, and the development of
ionic attractions, called salt bridges, between positively
and negatively charged sites on various amino acid side
chains within the protein
51. 51
Enzymes
• An enzyme is a protein that acts as a catalyst for
a biological reaction.
• Most enzymes are specific for substrates while
enzymes involved in digestion such as papain
attack many substrates
52. 52
Cofactors
• In addition to the protein part, many enzymes also have
a nonprotein part called a cofactor
• The protein part in such an enzyme is called an
apoenzyme, and the combination of apoenzyme plus
cofactor is called a holoenzyme. Only holoenzymes have
biological activity; neither cofactor nor apoenzyme can
catalyze reactions by themselves
• A cofactor can be either an inorganic ion or an organic
molecule, called a coenzyme
• Many coenzymes are derived from vitamins, organic
molecules that are dietary requirements for metabolism
and/or growth
53. 53
Types of Enzymes by Function
• Enzymes are usually grouped according to the
kind of reaction they catalyze, not by their
structures
54. 54
How Do Enzymes Work? Citrate
Synthase
• Citrate synthase catalyzes a mixed Claisen
condensation of acetyl CoA and oxaloacetate to
give citrate
• Normally Claisen condensation require a strong
base in an alcohol solvent but citrate synthetase
operates in neutral solution
55. 55
The Structure of Citrate
Synthase
• Determined by X-ray crystallography
• Enzyme is very large compared to substrates,
creating a complete environment for the reaction
56. 56
Mechanism of Citrate
Synthetase
• A cleft with functional groups binds oxaloacetate
• Another cleft opens for acetyl CoA with H 274
and D 375, whose carboxylate abstracts a
proton from acetyl CoA
• The enolate (stabilized by a cation) adds to the
carbonyl group of oxaloacetate
• The thiol ester in citryl CoA is hydrolyzed
57. 57
Protein Denaturation
• The tertiary structure of a globular protein is the
result of many intramolecular attractions that can
be disrupted by a change of the environment,
causing the protein to become denatured
• Solubility is drastically decreased as in heating
egg white, where the albumins unfold and
coagulate
• Enzymes also lose all catalytic activity when
denatured