PRKC1 (PKC mu) is a serine⁄threonine protein kinase that is phospholipid-dependant and activated by diacylglycerol and phorbol ester TPA. PRKC1 behaves similarly to most PKC isoenzymes of the PKC family, however, PRKC1 differs in some structural and enzymatic features from the other PKC isotypes, and has been shown to be involved in the signal transduction of a wide range of biological responses.