FIG. 1.

Schematic diagram of the LOS structures of C. jejuni 81-176 and mutants. (A) The structure of the 81-176 LOS has been reported to vary between the structure shown, which mimics GM₃ ganglioside, and a structure lacking the terminal GalNAc that mimics GM₂ ganglioside (13). The assignment of the roles of the cgtA, waaF, waaC, and cst genes in the biosynthesis of the 81-176 locus has been reported previously (9, 13, 18, 19). (B) Structure of the LOS core of the galT mutant of 81-176. (C) Structure of the LOS core of the lgtF mutant of 81-176.