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To detect the speA, adiA, speB, odc, hdc, ldc genes by PCR. (A) Negative control. (B) Positive control. (C) speA gene fragment. (D) adiA gene fragment. (E) speB gene fragment. (F) odc gene fragment. (G) hdc gene fragment. (H) ldc gene fragment. Lane 1, 5000 bp DNA ladder; lanes 2–7, PCR products by DNA from part of 27 strains.
