6.4.1.5 additional information - additional information GCCase shows sigmoidal kinetic behavior for geranoyl-CoA and bicarbonate but shows Michaelis-Menten kinetics for 3-methylcrotonyl-CoA and the cosubstrate ATP. The apparent K0.5 values of GCCase are 8.8 microM and 1.2 microM for geranoyl-CoA and bicarbonate, respectively 692864 6.4.1.5 0.008 - ATP - 649484 6.4.1.5 0.0084 - ATP - 649418 6.4.1.5 0.01 - ATP pH 8.5, 37°C 692864 6.4.1.5 0.014 - 3-methylcrotonyl-CoA pH 8.5, 37°C 692864 6.4.1.5 0.064 - geranoyl-CoA - 649418, 649484 6.4.1.5 0.58 - HCO3- - 649418 6.4.1.5 0.6 - HCO3- - 649484