activation of t cells by an antigen , a mitogen , or a combination of a phorbol ester ( 12-o-tetradecanoylphorbol-13-acetate [ tpa ] ) and a calcium ionophore ( a23187 ) leads to induction of a set of lymphokine genes .
C0031586
phorbol
C0039654
12-o-tetradecanoylphorbol-13-acetate