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. 1996 Dec 24;93(26):15305–15310. doi: 10.1073/pnas.93.26.15305

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Copyright © 1996, The National Academy of Sciences of the USA

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Negative ion MALDI mass spectra of NFs from the following R. tropici (pGMI149)(pGMI1962) derivatives. (A) The control strain with unmodified pGMI149. (B) A derivative with a nodC::Tn5 insertion in pGMI149. (C) A derivative with a nodI::Tn5 insertion in pGMI149. Tetrameric (IV) and pentameric (V) NFs were found with the following substitutions (nomenclature as proposed in ref. 9). 1-IV: m/z 1105 (IV, C16:0,S), m/z 1103 (IV, C16:1,S); 2-IV: m/z 1131 (IV, C18:1,S); 3-IV: m/z 1147 (IV, Ac, C16:0,S), m/z 1145 (IV, Ac, C16:1,S), m/z 1145 (IV, Me, C18:1,S); 4-IV: m/z 1173 (IV, Ac, C18:1,S); 1-V: m/z 1308 (V, C16:0,S), m/z 1306 (V, C16:1,S); 2-V: m/z 1334 (V, C18:1,S); 3-V: m/z 1350 (V, Ac, C16:0,S), m/z 1348 (V, Ac, C16:1,S), m/z 1348 (IV, Me, C18:1,S); 4-V: m/z 1376 (V, Ac, C18:1,S); 5-V: m/z 1390 (V, Me, Ac, C18:1,S).