the phorbol ester 12-o-tetradecanoyl phorbol-13-acetate ( tpa ) , a selective activator of protein kinase c , had no effect on the sensitivity to ca2+ or verapamil of k+-depolarized taenia preparations from the guinea-pig caecum , despite the use of high concentrations ( 1 microm for 3 h ) ;
C0031586
phorbol ester
C0039654
12-o-tetradecanoyl phorbol-13-acetate