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Cleavage sites on oxidized insulin B-chain for the keratinases of P. marquandii and D. microsporus. For comparison, the cleavage sites for proteinase K (14) as well as subtilisin, trypsin, and elastase (1) are presented. Thick arrow, major cleavage site, 20 min of hydrolysis; thin arrow, minor cleavage site, 12 h of hydrolysis.
