Has bacteriolytic activity against Gram-positive bacteria M.luteus. Also has chitinase activity. 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. Optimum pH is 6.5 at 37 degrees Celsius for bacteriolytic activity. Optimum pH is 3 at 40 degrees Celsius for chitinase activity. Monomer. Unlike Ruditapes philippinarum lysozyme, catalytic activity is not affected by variation in salt concentrations. Belongs to the glycosyl hydrolase 22 family. Type-I lysozyme subfamily.