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Unusual susceptibilities of chitin (A) and chitosan (B) to enzymatic hydrolysis demonstrated using the in-gel assay. Lane M, protein markers; Lane 1, lysozyme; Lane 2, cellulose; Lane 3, biopectinase; Lane 4, pancreatin; Lane 5, bromelain; Lane 6, papain; Lane 7, lactase; Lane 8, chitosanase.
