Abstract
Two rhamnobiose-lipid preparations have been studied by fast atom bombardment (FAB) tandem mass spectrometry. The principal rhanobiose-lipids contain the β-hydroxydecanoyl-β-hydroxydecanoate Rha-Rha-C10-C10 and the β-hydroxytetradecanoyl-β-hydroxytetradecanoate Rha-Rha-C14-C14. Both preparations contain minor components which are heterogenous in β-hydroxy fatty acid composition. FAB ionization of rhamnobiose-lipids in the presence of Na+ shows the formation of both [M + Na]+, [M + 2Na - H]+, [M + 3Na - 2H]+ and [M - H]− ions. Tandem mass spectrometry of the [M + 2Na - H]+ and [M - H]− ions give information about the sequence of the building blocks. Particularly, heterogeneity in β-hydroxy fatty acid composition is determined for the principal components and all the minor components present in the preparations.
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Manso Pajarron, A., de Koster, C.G., Heerma, W. et al. Structure identification of natural rhamnolipid mixtures by fast atom bombardment tandem mass spectrometry. Glycoconjugate J 10, 219–226 (1993). https://doi.org/10.1007/BF00702203
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DOI: https://doi.org/10.1007/BF00702203