Essential for lysis of bacterial cell wall, by showing cell wall hydrolyzing activity. Exhibits lytic activity against E.coli and S.typhi cell wall substrate. 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. Mutants are unable to form wild-type biofilms, which could be due to altered peptidoglycan metabolism. Encoded by the cryptic lambdoid prophage DLP12. Belongs to the glycosyl hydrolase 24 family.