Summary: The mechanism by which the mycelium of can use as sole carbon and nitrogen source was investigated. During fungal growth more than 80% of the muramic acid and diaminopimelic acid residues in the bacterial walls disappeared from the microbial biomass and appeared as soluble glycopeptides. Culture supernatants dissolved purified walls of , and bacteriolytic enzymes were obtained by ion-exchange chromatography of these supernatants. The main bacteriolytic enzyme activity was found to be a β--acetylmuramidase. Soluble bacterial wall fragments were partially purified by chromatography of the culture fluids. The chemical properties of these fragments were consistent with their having been produced by β--acetylmuramidase action on the peptidoglycan of the cell wall.


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