treatment of rat reticulocytes with tetradecanoyl phorbol acetate ( tpa ) , a tumor-promoting phorbol ester which activates protein kinase c , resulted in an about 50 % decrease in the stimulation of adenylate cyclase activity by a subsequent challenge with a beta-adrenoceptor agonist .
C0039654
tetradecanoyl phorbol acetate
C0031586
phorbol ester