tumor-promoting phorbol esters such as 12-o-tetradecanoylphorbol-13-acetate ( tpa ) directly activate in vitro ca2+-activated , phospholipid-dependent protein kinase ( protein kinase c ) , which normally requires unsaturated diacylglycerol .
C0031586
phorbol esters
C0039654
12-o-tetradecanoylphorbol-13-acetate