we now present evidence that activation of endogenous protein kinase c by the tumour-promoting phorbol ester tpa ( 12-o-tetradecanoyl- phorbol-13-acetate ) , or intracellular injection of the purified enzyme , enhances the voltage-sensitive calcium current in bag cell neurones of the mollusc aplysia .
C0031586
phorbol ester
C0039654
12-o-tetradecanoyl