the activation of phosphorylase by phenylephrine ( 1 microm ) ( but not by vasopressin or glucagon ) was inhibited both by tumour-promoting phorbol esters and diacylglycerols , but with a different dose-dependency : complete inhibition was achieved with concentrations of phorbol esters two orders of magnitude lower than those of diacylglycerol ;
C0012262
diacylglycerols
C0043791
diacylglycerol