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Chapter 21 enzymes and vitamins

Chapter 21 enzymes and vitamins - – Hormones –...

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Enzymes and Vitamins
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Enzymes Biological catalysts Usually proteins Names end in “ase” Pocket where reaction occurs is called the “active site” Molecule which reacts is called “substrate” Substrate fits into active site: “induced fit model” pH, temperature, metal ions effect enzyme activity Enzymes can be “inhibited” by molecules that resemble substrate (drugs?) Competitive Noncompetitive Enzyme activity is highly regulated Zymogens
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Unformatted text preview: – Hormones – Substrates and products (feedback) • Many enzymes require other molecules or ions to function: “Cofactors” or “co-enzymes” Vitamins “Vital amines” • Small organic molecules obtained from diet • Vitamins B and C are water-soluble – Act as cofactors for enzymes • Vitamins A, D, E, K are fat-soluble – Vitamin A: vision – Vitamin D: Bone growth – Vitamin E: Antioxidant – Vitamin K: Clotting...
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Chapter 21 enzymes and vitamins - – Hormones –...

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