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. 1978 Oct;136(1):158–167. doi: 10.1128/jb.136.1.158-167.1978

Composition of the fractions separated by polyacrylamide gel electrophoresis of the lipopolysaccharide of a marine bacterium.

J M DiRienzo, R A MacLeod
PMCID: PMC218645  PMID: 101510

Abstract

The sugar composition of lipopolysaccharide (LPS) isolated from whole cells of Alteromonas haloplanktis 214 (previously referred to as marine pseudomonas B-16, ATCC 19855), variant 3, of the lipid A, core, and side-chain fractions derived from it, and of the LPS fractions (LPS I, II, and III) obtained by subjecting it to preparative sodium dodecyl sulfate-polyacrylamide gel electrophoresis has been determined. Conditions optimum for the release of constituent monosaccharides by hydrolysis were established. Sugars were quantitated by gas-liquid chromatography of their alditol acetate derivatives. Lipid A was detected by gel electrophoresis and by the spectral shift obtained with a carbocyanin dye. A comparison of the molar ratios of the various fractions suggest that LPS III is an LPS molecule lacking an O-antigenic side chain, whereas LPS I and II are LPS molecules differing in side-chain composition. LPS I may be a mixture of two LPS species. In double immunodiffusion experiments using anti-whole-cell serum, LPS I and II showed a homologous cross-reaction with isolated whole-cell LPS. LPS III as well as lipid A, core, and side-chain fractions failed to give rise to precipitin lines.

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Selected References

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