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The following structure of the lipid A–core region of the lipopolysaccharide (LPS) from Proteus mirabilis serotype O28 was determined using NMR, MS, and chemical analysis of the core oligosaccharide, obtained by mild acid hydrolysis of LPS, and of the products of alkaline deacylation of the LPS: where S=β-GalALys (amide of β-d-galactopyranosyluronic acid with the α-amino group of l-lysine) or β-GalALys4PEtN...
The structure of a neutral polysaccharide isolated by degradation with dilute acetic acid of the lipopolysaccharide (LPS) of P. mirabilis O24 has been determined recently [E. Literacka et al., FEBS Lett., 456 (1999) 227–231]. Further studies of this LPS using alkaline degradation and hydrolysis at pH 4.5 showed that the polysaccharide chain includes an acetal-linked pyruvic acid residue, which is...
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