Enzymes - Biochemistry

Chemistry
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Front What is Michaelis-Menten constant?
Back Km is constant and cannot be changed by changing enzyme or substrate conc. Temp. dependent.At Km half of enzyme sites are occupied.
Tags Biochemistry
Front How is the catalytic efficiency of an enzyme determined?
Back Turnover number (kcat) tells us how fast a single enzyme is able to convert reactants to products.  kcat and Km are used to determine catalytic efficiency of an enzyme.  Higher kcat or lower Km --> faster (better) enzymeLower kcat or higher Km --> slower (worse) enzyme
Tags Biochemistry
Front How enzyme and substrate affinity is determined from Km?
Back Lower Km, higher affinity (less S is needed to occupy half of all of the enzymes available).Higher Km is lower affinity. 
Tags Biochemistry
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