High-performance liquid chromatography-ESI-MS full-scan spectra (positive mode) for dephosphorylated and permethylated OS of 1124lex2Glc1008 (A) and 1008lex2Gal1124 (B). The singly charged sodiated ions observed correspond to the following molecules: m/z 1264.1, Hex1·Hep3·reduced anhydro-2-keto-3-deoxyoctulosonic acid (AnKdo-ol); m/z 1467.8, Hex2·Hep3·AnKdo-ol; m/z 1671.7, Hex3·Hep3·AnKdo-ol; m/z 1875.5, Hex4·Hep3·AnKdo-ol; m/z 2079.3, Hex5·Hep3·AnKdo-ol; m/z 2120.8, HexNAc·Hex4·Hep3·AnKdo-ol; m/z 2282.8, Hex6·Hep3·AnKdo-ol; and m/z 2486.6, Hex7·Hep3·AnKdo-ol.