Fig. 6.
Confirmation of Gb3, Gb4, and nLc4 by fast atom bombardment–mass spectrometry.
FAB-MS of ANLL bands c (A), e (B), and f (C) showing molecular (M-H) and sequence ions. Congenic peaks, representing heterogeneity in ceramide fatty acid content, are identified in samples C and F. Note bands c and e both possess a trihexosylceramide sequence characteristic of all globo GSLs. The FAB-MS of bands c, e, and f is consistent with the structures of Gb3, Gb4, and nLc4, respectively (Table 1).
