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DraI restriction profiles (lanes 1, 2, 3, 4, and 5) and MseI restriction profiles (lanes 6, 7, 8, 9, and 10) of the amplified rrf-rrl spacer from strain TXW-1 and reference strains. The spacer digest was separated in a 15% acrylamide–0.75% bisacrylamide gel, stained with silver stain, and photographed. The species assignments of the strains are listed in Table 2. Lane M, molecular size markers.
