we have determined that sustained stimulation of transcription requires the persistent occupancy of a limited number of trh receptor sites and that the phorbol ester 12-o-tetradecanoylphorbol-13-acetate ( tpa ) , calcium ionophores ( a23187 , ionomycin ) , and the calcium channel agonist bay k 8644 enhance prl gene transcription .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol-13-acetate