Oob

Glycan chain

Tetra-peptide chain (amino acids)

Glycan chain

Peptidoglycan

Glycan chain

Figure 3.32 Components and Structure of Peptidoglycan Chemical structure of W-acetylglucosamine (NAG) and W-acetylmuramic acid (NAM); the ring structures of the two molecules are glucose. Glycan chains are composed of alternating subunits of NAG and NAM joined by covalent bonds. Adjacent glycan chains are cross-linked via their tetrapeptide chains to create peptidoglycan.

Peptidoglycan

Diaminopimelic acid Tetrapeptide chain

D-glutamic (amino acids) acid

Glycan chain

Figure 3.32 Components and Structure of Peptidoglycan Chemical structure of W-acetylglucosamine (NAG) and W-acetylmuramic acid (NAM); the ring structures of the two molecules are glucose. Glycan chains are composed of alternating subunits of NAG and NAM joined by covalent bonds. Adjacent glycan chains are cross-linked via their tetrapeptide chains to create peptidoglycan.

3.6 Cell Wall 59

outer membrane, a unique lipid bilayer embedded with proteins. The peptidoglycan layer is sandwiched between the cytoplasmic membrane and the outer membrane.

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