It is the target of some antibiotics, including penicillin, which blocks the action of the enzymes responsible for crosslinking the polysaccharide chains via tetrapeptides.  
The monomers of this substance are moved to their final destination bound to the carrier bactoprenol.  It is resistant to proteases because it contains D-amino acids, but lysozyme can break down its beta-1-4 linkages between repeating units of N-acetyl-muramic acid and N-acetyl-glucosamine.  It is the target of some antibiotics, including penicillin, which blocks the action of the enzymes responsible for crosslinking the polysaccharide chains via tetrapeptides.  FTP name this polymer that accounts for 90% of the dry weight of Gram-positive bacteria, the primary constituent of bacterial cell walls.
The monomers of this substance are moved to their final destination bound to the carrier bactoprenol.  
peptidoglycan [do NOT prompt on or accept 'proteoglycan']