carbachol ( 0.3 microm ) and the phorbol ester pma ( 1 microm ) potentiate the secretory response to vip ( 10 nm ) , forskolin ( 3 microm ) , and dibutyryl adenosine 3',5'-cyclic monophosphate ( dbcamp ) ( 0.5 mm ) both in the absence and presence of 2.5 mm extracellular calcium .
C0031586
phorbol ester
C0039654
pma