In allosteric enzyme kinetics, what is the equivalent of the Michaelis constant (Km) and what is its significance?

• A. Km, it represents the substrate concentration at Vmax.
• B. Km, it represents the substrate concentration at half Vmax.
• C. K0.5, it represents the substrate concentration at half Vmax.
• D. K0.5, it represents the substrate concentration at Vmax.

Answer: (C)