Chemical structure of peptidoglycan layer of gram positive bacteria
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Peptidoglycan(murein) is a polymer consisting of sugars and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria, forming the cell wall. The sugar component consists of alternating residues of β-(1,4) linked N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)
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In general, the following characteristics are present in gram-positive bacteria: Cytoplasmic lipid membrane. Thick peptidoglycan layer. Teichoic acids and lipoids are present, forming lipoteichoic acids, which serve as chelating agents, and also for certain types of adherence.
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