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Journal of Endotoxin Research
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Use of mass spectrometry to compare three O-chain-linked and free lipopolysaccharide cores: differences found in Bordetella parapertussis

H. Zarrouk

Equipe 'Endotoxines', ERS 571 du Centre National de la Recherche Scientifique, Université de Paris-Sud, Orsay, France

D. Karibian

Equipe 'Endotoxines', ERS 571 du Centre National de la Recherche Scientifique, Université de Paris-Sud, Orsay, France

I. Godard

Equipe 'Endotoxines', ERS 571 du Centre National de la Recherche Scientifique, Université de Paris-Sud, Orsay, France

M.B. Perry

Institute for Biological Sciences, National Research Council of Canada, Ottawa, Ontario, Canada

M. Caroff

Equipe 'Endotoxines', ERS 571 du Centre National de la Recherche Scientifique, Université de Paris-Sud, Orsay, France, martine.caroff{at}bbmpc.u-psud.fr

Plasma desorption mass spectrometry and matrix-assisted laser desorption/ionization mass spectrometry methods were used to investigate the molecular differences between lipopolysaccharide free core molecules and core molecules substituted by O-chains in Bordetella parapertussis, Salmonella ohio, and Escherichia coli 0119. The B. parapertussis analysis indicated a difference in mass of 569 amu corresponding to 3 distal sugars comprising terminal residues of heptose, galactosaminuronic acid, and, N-acetyl-N-methylfucosamine, a result supported by evidence from NMR and serology. No differences were evident in the analyses of cores in either S. ohio or E. coli O119, although the first O-chain unit carried by S. ohio core lacked a terminal glucose present in the residual O-chain repeating units.

Journal of Endotoxin Research, Vol. 4, No. 6, 453-458 (1997)
DOI: 10.1177/096805199700400609
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