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The catalytic efficiency for an enzyme is definedas
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- kcat
- Vmax/kα
- VMax/[E]0
- k&intfin;t/vmax
Correct Option: C
The ratio k(cat)/K(M)—often referred to as the “specificity constant”—is a useful index for comparing the relative rates of an enzyme acting on alternative, competing substrates. However, an alternative description, “catalytic efficiency”, is frequently used to compare the reactivity of two enzymes acting on the same substrate.
K2 here is also known as kcat/km, the catalytic efficiency of enzyme.
kcat/km = k2 = VMax/[E]0