Differences in protein expression in C. jejuni strains. 2-D SDS-PAGE gels (12%) showing: wild-type (A), cj0596 mutant (B), and cj0596 revertant (C) protein profiles. Proteins with greater expression in cj0596 mutant (fold change): HtrA (+2.5), Cj0998 (+2.1), FlaA (+2.0). Proteins with lesser expression in cj0596 mutant (fold change): EF-Ts (-2.9), SOD (-2.6), EF-Tu (-2.0, -1.9). CAT was found only in the cj0596 mutant, and Cj0596 was absent in the mutant. Each of these protein expression differences returned to a level statistically similar to wild-type in the revertant.