cholera toxin ( choleragen ) can stimulate adenylate cyclase [ ec 4.6.1.1 ; atp pyrophosphate-lyase ( cyclizing ) ] activity in whole particulate fractions or purified plasma membranes of homogenates of isolated fat cells provided special precautions are taken to stabilize the enzyme during the required preincubation period .
C1382029
atp
C0007603
plasma membranes