Essential Biochemistry - Enzymes (Section 4 - No. 29)

The Michaelis constant (Km) is:
Not changed by the presence of non-competitive inhibitor
Equaled to 1/2 Vmax
The substrate concentration at 1/2 Vmax
The equilibrium constant for the dissociation of ES complex

Explanation

Km is the substrate concentration at which the reaction rate is half of Vmax.

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