we have determined the relative roles of ca2+ and protein kinase c in regulating surfactant phosphatidylcholine secretion by utilizing exogenous atp and the phorbol ester tpa ( 12-o-tetradecanoylphorbol 13-acetate ) as secretagogues , along with maptam to chelate intracellular ca2+ and sphingosine to inhibit endogenous protein kinase c .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol 13-acetate