The American Heritage® Dictionary of the English Language, 4th Edition
n. A polymer found in the cell walls of prokaryotes that consists of polysaccharide and peptide chains in a strong molecular network. Also called mucopeptide, murein.
n. A polymer of glycan and peptides found in bacterial cell walls
Word Usage
"Cluster III genes, which are positively regulated by CbfA-CTD, are enriched in GO terms representing functions that support bacterial food uptake and degradation, such as peptidoglycan degradation (e.g., lysozyme activity) and proteolysis."