Living reference work entry
Peptidoglycan is a polymer with a structural role in the bacterial cell wall. It is a barrier that provides structural strength to the bacteria. It is made of polysaccharides attached to oligopeptides in linear chains ( N-acetylglucosamine and N-acetylmuramic acid alternating with cross-linked oligopeptides (no more than five amino acids)). The oligopeptides are attached to N-acetylmuramic acid. Due to the cross-linked oligopeptide, it constitutes a 3D structural layer, which is thicker in the case of Gram-positive bacteria (Fig. 1).
KeywordsCell Wall Bacterial Cell Bioorganic Chemistry Structural Layer Linear Chain
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