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Conservation of oppA in oral Treponema strains. (A) Southern blot of HindIII-digested chromosomal DNA probed with a 0.9-kb internal fragment of oppA. (B) Western blot of whole-cell extracts probed with anti-40 antibodies. Lanes: 1, T. denticola ATCC 35405; 2, T. denticola ATCC 35404; 3, T. denticola ATCC 33520; 4, T. vincentii LA-1; 5, T. denticola OTK; 6, T. denticola GM-1; 7, T. socranskii ATCC 35536; 8, T. pectinovorum ATCC 33768.
