C. jejuni Δape1 mutant has a pleomorphic cell shape, and other OAP mutants display unaltered cell morphology. DICM showing the morphology of wild-type strain C. jejuni 81-176 (A), the differentially curved Δape1strain (B), the complemented strain Δape1C with restored morphology (C), ΔpatB (D), ΔpatA (E), and Δoap (F). Cells were harvested from 7 h of growth in MH-TV broth at a mid-exponential phase of growth. Scale is 2 μm (black bar).