TABLE 2.

Proposed compositions for the negative fragment ions obtained by in-source collision-induced dissociation ESI-FT-MS of the LPS from lgtB⁻, lgtB⁻pagL⁺, and galE⁻lpxL1⁻ mutants of N. meningitidis (see Fig. 3)

^a Fragment ions are assigned according to the nomenclature of Domon and Costello (21). Abbreviations used are as follows: Kdo, 3-deoxy-d-manno-oct-2-ulosonic acid; AnKdo, anhydro-Kdo; Hep, l-glycero-d-manno-heptose; Hex, hexose; HexN, hexosamine; HexNAc, N-acetylhexosamine; Gly, glycine; P, phosphate; C₁₂OH, 3-hydroxydodecanoic acid; C₁₄OH, 3-hydroxytetradecanoic acid; C₁₂, dodecanoic acid.