inhibition of colony formation by the phorbol ester tumor promoter 12-o-tetradecanoylphorbol 13-acetate ( tpa ) over a wide range of concentrations ( 10 ( -4 ) -10 ( 2 ) ng/ml ) was examined in two normal human diploid fibroblast strains and eight cell lines derived from various human tumors .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol 13-acetate