Mutanolysin is an N-acetylmuramidase. Like lysozyme, it is a muralytic enzyme that cleaves the β-N-acetylmuramyl-(1→4)-N-acetylglucosamine linkage of the bacterial cell wall polymer
peptidoglycan-polysaccharide. Its carboxy terminal moieties are involved in the recognition and binding of unique cell wall polymers. Mutanolysin lyses Listeria and other Gram-positive bacteria
such as Lactobacillus and Lactococcus.
http://www.creative-enzymes.com/product/Native-Streptomyces-Globisporus-ATCC-21553-Mutanolysin_957.html