Gram-negative bacterial cell wall, illustration

Numéro d’image : 12327891
Gram-negative bacterial cell wall, illustration
Gram-negative bacterial cell wall, illustration. The horizontal layers include both an external and an internal membrane (blue), both containing transmembrane proteins (green, yellow and purple). The membranes are separated by a thin peptidoglycan layer (purple rods). The outer surface of the external membrane is often a lipopolysaccharide layer with lipids (purple) in the membrane, and long saccharide side chains (red) extending out. This is termed a Gram-negative cell wall because it does not retain the Gram stain that helps identify microbial life.
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Crédit: Science Photo Library / Kon, Kateryna
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