in the first system , the epithelium was topically exposed to pellets containing 7,12-dimethylbenz ( a ) anthracene ( dmba ) , used as the initiating agent , followed by pellets containing the phorbol ester 12-o-tetradecanoylphorbol-13-acetate ( tpa ) , the promoting agent .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol-13-acetate