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2-Acetamido-2-deoxy-beta-D-glucoside acetamidodeoxygluco-hydrolase. Catalyzes the hydrolysis of terminal, non-reducing 2-acetamido-2-deoxy-beta-glucose residues in chitobiose and higher analogs as well as in glycoproteins. Has been used widely in structural studies on bacterial cell walls and in the study of diseases such as mucolipidosis and various inflammatory disorders of muscle and connective tissue.