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A) Schematic of the Gram-negative cell envelope. PD: periplasmic domain of OmpA. P: turgor pressure. B) Chemical structure of lipopolysaccharide with structure-modifying enzymes. Moieties outlined in red are enzymatically labile. Gn: glucosamine, P: phosphate, H: heptose, G: glucose, K: keto-deoxyoctulosonate.
