Abstract
α2-3 and α2-6 sialyl linkage types of sialyllactoses and sialyl-N-acetyllactosamines were analyzed by post-source decay (PSD) fragmentation method using matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry. A new matrix of norharmane was suited for the MALDI-TOF measurements of sialyl oligosaccharides. The fragment ions B1 produced by the cleavage of α2-3 sialyl linkages indicate much higher intensity than those produced by the cleavage of α2-6 sialyl linkages in sialyllactoses and sialyl-N-acetyllactosamines. Thus, α2-3 sialyl linkages cleave much easier than α2-6 sialyl linkages in MALDI-PSD fragmentation method. These results suggest that the new techniques using PSD fragmentation of MALDI-TOF mass spectrometry enables us to distinguish α2-3 sialyl linkage from α2-6 linkage in sialyl oligosaccharides.
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Yamagaki, T., Nakanishi, H. A new technique distinguishing α2-3 sialyl linkage from α2-6 linkage in sialyllactoses and sialyl-N-acetyllactosamines by post-source decay fragmentation method of MALDI-TOF mass spectrometry. Glycoconj J 16, 385–389 (1999). https://doi.org/10.1023/A:1007050909293
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DOI: https://doi.org/10.1023/A:1007050909293