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. Author manuscript; available in PMC: 2010 Jan 4.
Published in final edited form as: Chembiochem. 2010 Jan 4;11(1):35–45. doi: 10.1002/cbic.200900557

Figure 1.

Figure 1

Simplified depiction of Gram-positive and Gram-negative bacterial cell envelopes. Gram-negative organisms have a distinct periplasm; Gram-positive organisms do not, but recent studies have suggested that they have a periplasmic-like compartment between the plasma membrane and the base of the peptidoglycan layers.[3] Proteins are omitted from the depictions for clarity. Membrane-embedded, membrane-anchored, and peptidoglycan-associated proteins are abundant in the cell membranes of both Gram-positive and Gram-negative organisms. LTA: lipoteichoic acid; LPS: lipopolysaccharide; WTA: wall teichoic acid.