The Cell wall Peptidoglycan Peptidoglycan Polymer (amino acids sugars) Unique to bacteria Sugars; NAG NAM(backbone) -ac uram N-acetylglucosamine N-acetyl- lucosamin N-acetylmuramic acid (The same in all bacterial species) G Basic structural unit of peptidoglycan Tetrapeptide(vary from species) -D form of Amino acids(not L form) Hard to break down d form Pentapeptide(vary from species) Amino acids cross link nag NAM• Peptidoglycan Polymer (amino acids + sugars) • Unique to bacteria • Sugars; NAG & NAM (backbone) – N-acetylglucosamine – N-acetylmuramic acid (The same in all bacterial species) • Tetrapeptide (vary from species) -D form of Amino acids (not L form) Hard to break down D form • Pentapeptide (vary from species) -Amino acids cross link NAG & NAM Peptidoglycan The Cell Wall