the stimulatory effect of vip on 14c-catecholamine synthesis was additive with that of carbamylcholine , which was dependent upon extracellular ca2+ , but not with that of phorbol ester 12-o-tetradecanoyl phorbol 13-acetate ( tpa ) , an activator of protein kinase c .
C0031586
phorbol ester
C0039654
phorbol