The ζ protein kinase C isoform from the testis of the grey mullet Mugil cephalus with a specific reaction protein of Mr 48,000 on oolemma

Abstract The ζ protein kinase C isoform (PKC-ζ) was purified from the testis of the grey mullet Mugil cephalus and has relative masses ( M r ) of 65,000 and 63,000. The subunits of PKC-ζ from spermatozoa degenerated to M r 58,000 and 53,000 after continuous freezing and thawing. Proteins of M r 48,000 on the oolemma of the grey mullet Mugil cephalus were found to be the reaction proteins of the PKC-ζ from spermatozoa.