... B,O-3 and O-4 of residue C, O-3 of residue D,O-4andO- 6of residues E and F, O-6 of residue G, O-5 and O-4 of residueL,whereasI was a terminal residue. In the high field region of the spectrum ... absence of anomericsignals from GlcN I and GlcN II of Lipid A, the lack of pyruvate methyl groups, as a consequence of the cleavage of the ketal group under acid treatment, and the presence of singlet ... supportedby the finding that an alternative minor glycoform of theLOS has been found, with the typical oligosaccharidestructure of a potential substrate for chain elongation andO-polysaccharide attachment...