FIGURE 4.
Full-length CwpV retains its aggregation-promoting properties. A, aggregation of C. difficile from liquid culture (starting A600 nm of 4) observed in suspensions of C. difficile ΔcwpV (pCwpV (WT)), ΔcwpV (pCwpVK410G/D411G), ΔcwpV (pCwpVT413S), ΔcwpV (pCwpVT413C), ΔcwpV (pCwpVT413A), and ΔcwpV (pCwpVT413V) but not C. difficile 630. B, colony morphology caused by CwpV overexpression in C. difficile. All strains overexpressing CwpV show a smaller, smoother edged morphology compared with the larger, ruffled edged colonies of C. difficile 630 (WT).