Mass spectrometry of the four major fractions of polar lipids.

<p>Lipids derived from the second lipid extract of <i>B. pseudomallei</i>. Each mass spectrometric trace has the lipid composition of its fraction indicated by a 2D-TLC plate in the upper right corner. Lipid spot numbers correspond to those used in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0080368#pone-0080368-g001" target="_blank">Figures 1</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0080368#pone-0080368-g002" target="_blank">2</a>. Major ions of each spot are highlighted in colored boxed. Molecular ions are in bold and enlarged in panels they first appeared. Panel A represents lipid fraction V (F4); panel B represents lipid fraction VI (F5); panel C represents lipid fraction VII (F6); and panel D represents lipid fraction VIII (F7).