6.4.1.4	ATP + 3-methylcrotonoyl-CoA + HCO3- + H+ = ADP + phosphate + 3-methylglutaconyl-CoA	ATP and HCO3- bind sequentially to the enzyme. ATP and 3-methylcrotonoyl-CoA bind in ping-pong fashion	1896	
6.4.1.4	ATP + 3-methylcrotonoyl-CoA + HCO3- + H+ = ADP + phosphate + 3-methylglutaconyl-CoA	bi bi uni uni ping-pong mechanism, i.e. double-displacement kinetic mechanism	1894