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Myr-ZIP is a cell-permeable inhibitor of the constitutively active protein kinase C (PKC) isoform PKMζ (Ki = 0.076-2.11 µM).1,2 It also inhibits PKCα when used at a concentration of 10 µM.3 Myr-ZIP (5 µM) prevents PKC translocation to the plasma membrane induced by ionomycin in HEK293 cells expressing A-kinase anchor protein 79 (AKAP79). Myr-ZIP inhibits the conditioned place preference response to morphine in rats when administered intracranially into the nucleus accumbens core at doses of 10 and 30 nmol/0.5 µl per side.4

1.Yao, Y., Shao, C., Jothianandan, D., et al.Matching biochemical and functional efficacies confirm ZIP as a potent competitive inhibitor of PKMζ in neuronsNeuropharmacology64(1)37-44(2013) 2.Lee, A.M., Kanter, B.R., Wang, D., et al.Prkcz null mice show normal learning and memoryNature493(7432)419-419(2013) 3.Bogard, A.S., and Tavalin, S.J.Protein kinase C (PKC)ζ pseudosubstrate inhibitor peptide promiscuously binds PKC family isoforms and disrupts conventional PKC targeting and translocationMol. Pharmacol.88(4)728-735(2015) 4.Li, Y.-q., Xue, Y.-x., He, Y.-y., et al.Inhibition of PKMzeta in nucleus accumbens core abolishes long-term drug reward memoryJ. Neurosci.31(14)5436-5446(2011)

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