Used in research to selectively inhibit protein kinase C (PKC) enzymes by mimicking the regulatory domain of PKC. This peptide blocks the active site of the enzyme, preventing substrate phosphorylation and allowing scientists to study the role of PKC in cellular signaling pathways. Commonly applied in studies related to cell proliferation, apoptosis, and neurotransmission. Due to its specificity, it helps elucidate PKC-dependent mechanisms without affecting other kinase pathways. Often introduced into cell cultures or intracellular environments using delivery vectors or permeabilization techniques.