Figure 2.
S-layer proteins of C. difficile Ox247 and mutants. Strains were cultured in BHIS broth, and the S-layer was prepared using low pH glycine extraction. The LMW (▷) and HMW (▶) S-layer proteins of strain 630 are indicated. The 20-kDa LMW SLP (→) predicted in Ox247 is not found in the WT strain, but is found in some but not all mutants. The ∼45-kDa bands in Ox247 analyzed by MS are indicated (**). M, Mr markers; lane 1, 630; lane 2, Ox247 WT; lane 3, orf2::erm; lane 4, orf2::erm (pAAM008); lane 5, orf3::erm; lane 6, orf2::erm (pEJR004); lane 7, orf4::erm; lane 8, orf4::erm (pEJR007); lane 9, orf7::erm; lane 10, orf16::erm lane 11, orf16::erm (pEFR009); lane 12, orf19::erm; and lane 13, orf19::erm (pAAM011).