FIG. 5.

C. jejuni protein secretion is independent of σ²⁸. C. jejuni cells were harvested from Mueller-Hinton agar plates labeled in minimal essential medium in the absence (lanes 1 and 2) and presence (lanes 3 and 4) of FBS as outlined in Materials and Methods. Lanes: 1, C. jejuni F38011 (without FBS); 2, C. jejuni fliA mutant (without FBS); 3, C. jejuni F38011 (with FBS); 4, C. jejuni fliA mutant (with FBS). The positions of molecular mass standards are indicated on the left (in kilodaltons).