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Biochim Biophys Acta. 1983 May 16;751(3):439-43.

Structural elucidation by field desorption and electron-impact mass spectrometry of the C-mycosides isolated from Mycobacterium smegmatis.


C-mycosides are superficial type-specific glycopeptidolipids of mycobacterial origin. In the present work, we have shown that field desorption mass spectrometry using the cationization method is a useful method for the molecular weight determination of such compounds. Complementary structural information has been obtained by electron-impact mass spectrometry. Combination of both methods has permitted the elucidation of the structure of the C-mycosides of Mycobacterium smegmatis, ATCC 607. This structure is similar to those described elsewhere, but some minor differences are observed in the lipid portion, mainly in the double bond location.

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