1. Enzymes are protein catalysts that lower the activation energy of biochemical reactions and increase their rates without being consumed.
2. They are classified into six main categories based on the type of reaction they catalyze.
3. Enzyme activity is affected by environmental factors like temperature and pH, as well as cofactors that bind enzymes. Inhibitors can also decrease enzyme activity.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
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Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
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Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Basavarajeeyam is an important text for ayurvedic physician belonging to andhra pradehs. It is a popular compendium in various parts of our country as well as in andhra pradesh. The content of the text was presented in sanskrit and telugu language (Bilingual). One of the most famous book in ayurvedic pharmaceutics and therapeutics. This book contains 25 chapters called as prakaranas. Many rasaoushadis were explained, pioneer of dhatu druti, nadi pareeksha, mutra pareeksha etc. Belongs to the period of 15-16 century. New diseases like upadamsha, phiranga rogas are explained.
2. Importance
• Enzymes play an important role in
Metabolism, Diagnosis, and Therapeutics.
• All biochemical reactions are enzyme
catalyzed in the living organism.
• Level of enzyme in blood are of diagnostic
importance e.g. it is a good indicator in
disease such as myocardial infarction.
• Enzyme can be used therapeutically such as
digestive enzymes.
3. • Virtually all reactions in the body are
mediated by enzymes, which are protein
catalysts, usually within cells, that increase the
rate of reactions without being changed in the
overall process
4. Define enzymes
(Enzymes as Biological Catalysts)
• Enzymes are proteins that increase the rate of
reaction by lowering the energy of activation
• They catalyze nearly all the chemical reactions
taking place in the cells of the body.
• Not altered or consumed during reaction.
• Reusable
5. NOMENCLATURE
• Each enzyme is assigned two names. The first
is its short, recommended name, convenient
for everyday use.
• The second is the more complete systematic
name, which is used when an enzyme must be
identified without ambiguity
6. Recommended name
Most commonly used enzyme names have the
suffix “-ase” attached to the substrate of the
reaction, such as glucosidase and urease. Names
of other enzymes include a description of the
action performed, for example, lactate
dehydrogenase (LDH) and adenylyl cyclase. Some
enzymes retain their original trivial names, which
give no hint of the associated enzymatic reaction,
for example, trypsin and pepsin.
7. Systematic name
• In the systematic naming system, enzymes are
divided into six major classes each with
numerous subgroups. For a given enzyme, the
suffix -ase is attached to a fairly complete
description of the chemical reaction catalyzed,
including the names of all the substrates, for
example, lactate:nicotinamide adenine
dinucleotide (NAD+) oxidoreductase.
8. ACTIVE SITES
• Enzyme molecules contain a special pocket or
cleft called the active sites.
9. Lock-and-Key Model
• In the lock-and-key model of enzyme action:
- the active site has a rigid shape
- only substrates with the matching shape can fit
- the substrate is a key that fits the lock of the
active site
This explains enzyme
specificity
This explains the loss
of activity when
enzymes denature
10. APOENZYME and HOLOENZYME
• The enzyme without its non protein moiety is termed
as apoenzyme and it is inactive.
• Holoenzyme is an active enzyme with its non protein
component.
11. Important Terms to Understand
Biochemical Nature
And Activity of Enzymes
• Cofactor:
–A cofactor is a non-protein chemical
compound that is bound (either tightly or
loosely) to an enzyme and is required for
catalysis.
–Types of Cofactors:
• Coenzymes.
• Prosthetic groups.
12. Types of Cofactors
• Coenzyme:
The non-protein component, loosely bound to apoenzyme
by non-covalent bond. Coenzymes or cosubstrates only
transiently associate with the enzyme and dissociate from the
enzyme in an altered state (for example, NAD+).
• Examples : vitamins or compound derived from vitamins.
• Prosthetic group
The non-protein component, tightly bound to the
apoenzyme by covalent bonds is called a Prosthetic group.
• permanently associated with the enzyme
13. Enzyme Specificity
• Enzymes have varying degrees of specificity
for substrates
• Enzymes may recognize and catalyze:
- a single substrate
- a group of similar substrates
- a particular type of bond
14.
15. Important Terms to Understand
Biochemical Nature
And Activity of Enzymes
Activation energy or Energy of Activation:
• All chemical reactions require some amount of
energy to get them started.
OR
• It is First push to start reaction.
This energy is called activation energy.
16. Mechanism of Action of Enzymes
• Enzymes increase reaction rates by
decreasing the Activation energy:
• Enzyme-Substrate Interactions:
‒Formation of Enzyme substrate
complex by:
‒Lock-and-Key Model
‒Induced Fit Model
19. Lock-and-Key Model
• In the lock-and-key model of enzyme action:
- the active site has a rigid shape
- only substrates with the matching shape can fit
- the substrate is a key that fits the lock of the active site
• This is an older model, however, and does not work for all
enzymes
20. Induced Fit Model
• In the induced-fit model of enzyme action:
- the active site is flexible, not rigid
- the shapes of the enzyme, active site, and substrate adjust
to maximumize the fit, which improves catalysis
- there is a greater range of substrate specificity
• This model is more consistent with a wider range of enzymes
23. Product
• The enzyme and product separate
• EP E + P The product
is made
Enzyme is
ready
for
another
substrate.
EP
24. 28
What Affects Enzyme Activity?
• Three factors:
1. Environmental Conditions
2. Cofactors and Coenzymes
3. Enzyme Inhibitors
25. 29
1. Environmental Conditions
1. Extreme Temperature are the most
dangerous
- high temps may denature (unfold) the
enzyme.
2. pH (most like 6 - 8 pH near neutral)
3. substrate concentration .
26. 30
2. Cofactors and Coenzymes
• Inorganic substances (zinc, iron) and
vitamins (respectively) are sometimes need
for proper enzymatic activity.
• Example:
Iron must be present in the quaternary
structure - hemoglobin in order for it to
pick up oxygen.
28. Environmental factors
• pH also affects the rate of enzyme-
substrate complexes
–Most enzymes have an optimum pH of
around 7 (neutral)
• However, some prefer acidic or basic conditions
29. Substrate Concentration and Reaction Rate
• The rate of reaction increases as substrate
concentration increases (at constant enzyme
concentration)
• Maximum activity occurs when the enzyme is
saturated (when all enzymes are binding substrate)
34. • 1. Km characteristics: Km, the Michaelis constant, is characteristic of an enzyme
and its particular substrate and reflects the affinity of the enzyme for that
substrate. Km is numerically equal to the substrate concentration at which the
reaction velocity is equal to one half Vmax. Km does not vary
with enzyme concentration.
• a. Small Km: A numerically small (low) Km reflects a high affinity of the enzyme for
substrate, because a low concentration of substrate is needed to half-saturate the
enzyme—that is, to reach a velocity that is one half Vmax .
• b. Large Km: A numerically large (high) Km reflects a low affinity of enzyme for
substrate because a high concentration of substrate is needed to half saturate the
enzyme.
35. Michaelis Constant (Km)
V = Vm * [S]
Km + [S]
Key Points:
1.Km has same units as [S]
2.At some point on graph, Km must equal [S]
36. V = Vm * [S] = Vm * [S] = Vm
[S] + [S] 2 [S] 2
When V = Vm/2
[S] = Km
38. V = Vm* [S]
Km + [S]
• Small Km Vm reached at low concentration [S]
• Large Km Vm reached at high concentration [S]
Vmax
Vmax/2
Km
[S]
39. V = Vm* [S]
Km + [S]
Michaelis Constant (Km)
• Small Km Substrate binds easily at low [S]
• High affinity substrate for enzyme
• Large Km Low affinity substrate for enzyme
Vmax
Vmax/2
40. Key Points
• Km is characteristic of each substrate/enzyme
• Vm depends on amount of enzyme present
• Can determine Vm/Km from
• Michaelis Menten plot V vs. [S]
• Lineweaver Burk plot 1/V vs. 1/[S]
41. Lineweaver Burk Plot
V = Vm* [S]
Km + [S]
1 = Km + [S] =
V Vm [S]
Km + [S]
Vm [S] Vm[S]
1 = C * 1 + 1
V [S] Vm
43. Enzyme Inhibitors
S
I
E
Competitive
Competes for same site as S
Lots of S will overcome this
S
E
P
Non-competitive
Binds different site S
Changes S binding site S
cannot overcome this
Effect similar to no
enzyme
I
48. Competitive inhibition
• This type of inhibition occurs when the inhibitor binds reversibly to the
same site that the substrate would normally occupy and, therefore,
competes with the substrate for binding to the enzyme active site.
• 1. Effect on Vmax: The effect of a competitive inhibitor is reversed by
increasing the concentration of substrate. At a sufficiently high [S], the
reaction velocity reaches the Vmax observed in the absence of inhibitor,
that is, Vmax is unchanged in the presence of a competitive inhibitor
• 2. Effect on Km: A competitive inhibitor increases the apparent Km for a
given substrate. This means that, in the presence of a competitive
inhibitor, more substrate is needed to achieve half Vmax.
49. Noncompetitive inhibition
• This type of inhibition is recognized by its characteristic effect causing a
decrease in Vmax. Noncompetitive inhibition occurs when the inhibitor
and substrate bind at different sites on the enzyme. The noncompetitive
inhibitor can bind either free enzyme or the ES complex, thereby
preventing the reaction from occurring
• 1. Effect on Vmax: Effects of a noncompetitive inhibitor cannot b
overcome by increasing the concentration of substrate. Therefore,
noncompetitive inhibitors decrease the apparent Vmax of the reaction.
• 2. Effect on Km: Noncompetitive inhibitors do not interfere with the
binding of substrate to enzyme. Therefore, the enzyme shows the same
Km in the presence or absence of the noncompetitive inhibitor, that is, Km
is unchanged in the presence of a noncompetitive inhibitor
50. Naming Enzymes
• The name of an enzyme in many cases end in –ase
• For example, sucrase catalyzes the hydrolysis of sucrose
• The name describes the function of the enzyme
For example, oxidases catalyze oxidation reactions
• Sometimes common names are used, particularly for the
digestion enzymes such as pepsin and trypsin
• Some names describe both the substrate and the function
• For example, alcohol dehydrogenase oxides ethanol
51. Enzymes Are Classified into six functional
Classes (EC number Classification) by the
International Union of Biochemists (I.U.B.).
on the Basis of the Types of
Reactions That They Catalyze
• EC 1. Oxidoreductases
• EC 2. Transferases
• EC 3. Hydrolases
• EC 4. Lyases
• EC 5. Isomerases
• EC 6. Ligases
52. Principle of the international
classification
Each enzyme has classification number
consisting of four digits:
Example, EC: (2.7.1.1) HEXOKINASE
53. • EC: (2.7.1.1) these components indicate the following
groups of enzymes:
• 2. IS CLASS (TRANSFERASE)
• 7. IS SUBCLASS (TRANSFER OF PHOSPHATE)
• 1. IS SUB-SUB CLASS (ALCOHOL IS PHOSPHATE
ACCEPTOR)
• 1. SPECIFIC NAME
ATP,D-HEXOSE-6-PHOSPHOTRANSFERASE (Hexokinase)
54. H O
OH
H
OH
H
OH
CH2OH
H
OH
H H O
OH
H
OH
H
OH
CH2OPO3
2
H
OH
H
2
3
4
5
6
1 1
6
5
4
3 2
ATP ADP
Mg2+
glucose glucose-6-phosphate
Hexokinase
1. Hexokinase catalyzes:
Glucose + ATP glucose-6-P + ADP