The rate of carboxylation (V) is the rate that RuBisCO fixes CO to RuBP under substrate saturated conditions. A higher value of V corresponds to a higher rate of carboxylation. This rate of carboxylation can also be represented through its Michaelis-Menten constant K, with a higher value of K corresponding to a higher rate of carboxylation. V is represented by V, and K is represented as K in the generalized Michaelis-Menten curve. Although the rate of carboxylation varies among RuBisCO types, RuBisCO on average fixes only three molecules of CO per second. This is remarkably slow compared to typical enzyme catalytic rates, which usually catalyze reactions at the rate of thousands of molecules per second.