the possible influence of an activator of protein kinase c , the tumor-promoting phorbol ester , pma ( phorbol-12-myristate-13-acetate ) , upon small bovine luteal cell steroidogenesis was investigated in vitro , pma had no significant effect on basal and dibutyryl cyclic amp ( dbcamp ) -stimulated progesterone production but markedly modulated the lh-stimulated progesterone and camp productions .
C0031586
phorbol ester
C0039654
pma