BIS 102 Chapter 13 Notes

BIS 102 Chapter 13 Notes - Enzyme Biological catalysts that...

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Enzyme Biological catalysts that function in dilute, aqueous solutions under mild conditions 9(e.g. pH) and low temperatures to increase reaction rate Catalytic power: ratio of catalyzed rate to un-catalyzed rate Specificity Nomenclature Common names International Commission on Enzymes (EC numbers): Six classes Terms Holoenzyme: protein and prosthetic group Apoenzyme: Protein lacking prosthetic group Prosthetic group: firmly bound coenzyme Coenzyme: organic compound cofactor Chemical Kinetics Rate Law: v = -dA/dt=k[A]n o K = rate constant o n = order of reaction n = 1, first order [A] n n=2, second order [A] 2 or [A][B] Molecularity: Number of molecules that must simultaneously react Reaction Rates Limited by activation barrier: free energy needed to reach transition state Arrhenius equation k = Ae -G/ΔRT Influenced by temperature and catalysts Enzyme kinetics Saturate-able: zero-order kinetics at high [S] Michaelis-Menton: v=(V
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This note was uploaded on 07/16/2008 for the course BIS 102 taught by Professor Hilt during the Summer '08 term at UC Davis.

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BIS 102 Chapter 13 Notes - Enzyme Biological catalysts that...

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