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Western immunoblot probed with antibodies raised against recombinant protein rOppA40 (anti-40). Samples were heated at 100°C prior to electrophoresis. Arrows indicate the location of native OppA and rOppA40. Lanes: 1, purified 70-kDa protein; 2, T. denticola whole-cell extract; 3, E. coli pMT1 whole-cell extract.
