Definition: A protective structure outside the cytoplasmic membrane composed of peptidoglycan (also known as murein), a molecule made up of a glycan (sugar) backbone of repetitively alternating N-acetylglucosamine and N-acetylmuramic acid with short, attached, cross-linked peptide chains containing unusual amino acids. An example of this component is found in Escherichia coli.
GO:0005618 - cell wall
GO:0009276 - Gram-negative-bacterium-type cell wall (19)
biosynthetic peptidoglycan transglycosylase (mtgA)
Unification Links: GO:0009274
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