Markus Wyss, Peter James, Joerg Schlegel, Theo Wallimann
Abstract:Proteinase K, subtilisin, pronase E, elastase, bactotrypsin, and thermolysin are all shown here to cleave native mitochondrial creatine kinase from chicken heart (Mib-CK) very specifically at a single site, either before or after Ala-323. In analogy with hen egg ovalbumin, where the same proteases all cleaved the polypeptide chain very specifically around Ala-352, Ala-323 of Mib-CK may be located in an exposed surface loop that is sensitive to protease attack. Gel permeation chromatography demonstrated that th…
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