Caution Some isomerization to the 1,3-isomer may occur in storage or in solution. Other Notes Synthetic 1,2-diglyceride of short chain fatty acid. Biochem/physiol Actions Cell-permeable, diacylglycerol (DAG) analog, and activator of protein kinase C (PKC). Shown to possess a lower affinity for the α isoform of PKC than for the other isoforms. Mimics the action of tumor-promoting phorbol esters, such as phorbol 12-myristate 13-acetate (PMA). Inhibits slow (L-type) Ca2+ current in rat heart cells independently of PKC activation and also inhibits the cGMP-gated channel in rod outer segments by a phosphorylation-independent mechanism. |