Promega
Proteinase K (PK) Solution
Proteinase K, produced by the fungus Tritirachium album Limber, is a serine protease that exhibits broad cleavage activity. Proteinase K (PK) Solution is supplied at a concentration of 20mg/ml in 10mM Tris-HCl (pH 7.5), 1mM calcium chloride, 50% glycerol.