... (phosphocholine), 165.13 and lipid A- OH (O-deacylated lipid A) , 953.02. Relativeabundance was estimated from the area of molecular ion peak relative to the total area (expressed as percentage). Peaks representing ... methylation analysis, on the basis of the chemical shift data and the large J2,3, J3,4and J4,5values( 9 Hz). On the basis of low J3,4and J4,5values (<4 Hz)and chemical shift data, the ... Group and Department of Paediatrics, Weatherall Institute of Molecular Medicine,John Radcliffe Hospital, Oxford, UKStructural analysis of the lipopolysaccharide (LPS) from nontypeable Haemophilus...