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DGGE analysis of tet(Q) amplicons from steer rumen samples. Lanes 1 and 11, synthetic marker composed of known 16S rDNA sequences with various G+C contents; lanes 2 through 9, rumen samples from steers 277, 279, 280, 281, J277, J279, J280, and J281, respectively; lane 10, positive control pBT-1 [tet(Q)].
