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Recombinant OprF binds C3b. Lysates from recombinant OprF E. coli or vector control were stained with Coomassie blue G-250 (A) or subjected to Western blot with anti-OprF antibody (B) or incubated with normal human serum, washed, and probed with anti C3b antibody (C). Arrows represent the positions of OprF.
