Can proteinase K be contaminated with chymotrypsin?

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Tesneem Nusayr

How? Why would you think that?

Now I'm curious

Francisco Solano

Proteinase K is a fungal protease. It is difficult a contamination with mammalian chymotrypsin. However, in spite of its broad specificity, proteinase K is especially active on peptide bonds involving aliphatic and aromatic amino acids, similar to chymotrpsyn.