Fig. 1.

Primary structure of different glycolipids examined in this study. A: Diagram represents endogenous antigens, such as GalCer (R1 = H, R2 = H, R3−R6 = H) (1); FMC-7 (R1 = OAc, R2−R6 = Ac) (structure described here); and sulfatide (R1-R4 = H, R5 = HSO⁻₄, R6 = H) (33). R1 and R2 represent hydroxy and nonhydroxy fatty acyl groups, respectively. B: Mycoplasma fermentans glycolipid MfGL-II (19). C: LPS from Escherichia coli J5 (34). Abbreviations: FMC, fast migrating cerebroside; GalCer, galactosylceramide; GlcNAc, N-acetylglucosamine; Hep, L-glycero-D-manno-heptopyranose; Kdo, 3-deoxy-D-manno-octulopyranosonic acid; LPS, lipopolisaccharide.