Structure of a Gram-Negative Cell Wall

Gram-negative bacteria stain pink with the gram stain procedure. The Gram-negative cell wall is composed of a thin, inner layer of peptidoglycan and an outer membrane consisting of molecules of phospholipids, lipopolysaccharides (LPS), lipoproteins and sutface proteins. The outer membrane of Neisseria has shorter lipooligosaccharides (LOS) instead of lipopolysaccharides.

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Updated: January 27, 2001
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