Structural components for each of the following molecules:
Enzymes (amyl ase , pepsin, trypsin, peptid ase , malt ase , lip ase , nucle ase , DNA/RNA polymer ase etc.) act as catalysts for all cellular chemical reactions.
Some more structural functions!
A group of protein hormones (thyroxin, insulin, oxytocin etc.) aids metabolism and provides physiological effects .
Red blood cells /RBC’s (made up of hemoglobin (Hb) transports oxygen/carbon dioxide and act as buffers .
Remember this one?
Cell membrane (scattered proteins and glycoproteins) allows the passage of water, ions, small molecules, amino acids and recognizes foreign cells and microorganisms(glycoprotein)
Wow—proteins do a lot!!
Ligaments , tendons and bone (collagen) provide bone and muscle attachments, strength and stability; muscle (actin, myosin) facilitates movement.
Hair and nails
OK…the last of the functions…for now
Antibodies (Y-shaped proteins) deactivates antigens (See C6).
Microfilaments (cytoskeleton filaments/contractile proteins) provide movement of synaptic vesicles in neurons (See nervous system).
amino acids (áá).
approximately 20 different amino acids are produced by the body. These amino acids can be arranged in many combinations and sequences. This accounts for the countless number of unique proteins with only 20 different amino acids!
*Molecular Structure of Amino Acids
Let’s learn how to draw one!
All right let’s try it out…
And the rest of it
Formation of a protein polymer through dehydration synthesis (-H 2 O ).
E.g. Collagen, keratin, hemoglobin, glycoproteins, channel and carrier proteins, amyl ase , malt ase , pepsin, insulin, oxytocin etc.
A peptide bond forms between the joining amino acids/monomers.
Dehydration synthesis occurs in the liver and body cells.
Formation of a protein monomer through hydrolysis ( +H 2 O ).
E.g. the many different amino acids; lysine, tyrosine, phenylalanine, tryptophan, valine, glutamate etc.
Peptide bonds between the amino acids are destroyed within the protein polymer.
Hydrolysis occurs in your stomach and small intestine.
Some animations….if we have time
http://www.coolschool.ca/lor/BI12/unit2/U02L01.htm (2 Videos on Proteins)