Bifunctional enzyme with lysozyme/chitinase activity. Random endo-hydrolysis of N-acetyl-beta-D-glucosaminide (1->4)-beta-linkages in chitin and chitodextrins. Hydrolysis of (1->4)-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins. Monomer. Belongs to the glycosyl hydrolase 19 family. Chitinase class I subfamily.