a simple model is developed to explain the activation of rat liver plasma membrane adenylate cyclase [ atp pyrophosphate-lyase ( cyclizing ) , ec 4.6.1.1 ] by guanosine nucleotides and glucagon and the dependence of the catalytic rate on mg2+ , h+ , and substrate concentrations .
C0007603
plasma
C1382029
atp pyrophosphate-lyase