the tumor-promoting phorbol ester , 12-o-tetradecanoylphorbol-13-acetate ( tpa ) causes a dose-dependent induction ( up to 300-fold ) of ornithine decarboxylase activity in the epidermis of intact mice within 5 hours after the application to the skin of from 1 to 10 nmoles of the ester in 0.2 ml of acetone .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol-13-acetate