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The chitinolytic system from S. marcescens. The enzyme system comprises three family GH18 chitinases, processive ChiA and ChiB and nonprocessive ChiC, a family GH20 chitobiase that cleaves chitobiose and CBP21, a lytic polysaccharide monooxygenase. The structures of all enzymes, except ChiC, have been reported previously (11, 13, 19, 20, 29–35). The enzymes are shown with their substrates in light teal. An SDS-PAGE gel of the entire system has been included in supplemental Fig. S1.
