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PCR-DGGE profiles generated from fecal samples. Lanes 1 through 3, subject 5 control, test, and posttest period samples; lanes 4 through 6, subject 6 samples, showing the appearance of a new 16S rDNA sequence in the profile during the test period (lane 5, circle); lanes 7 through 9, subject 7 samples; lanes 10 through 12, subject 9 samples, showing alterations in the profiles (circle) of control and test period samples compared to the posttest period sample.
