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. 2006 Sep;72(9):5990–5997. doi: 10.1128/AEM.00233-06

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FIG. 2. — V₃ 16S rRNA gene DGGE profiles from all five sampling points (S1 to S5) of three individual subjects (I1 to I3), each representing one of the three test groups (G1 to G3). The day of sample collection at a given sampling point is indicated (day 1 [d1], d2, and d3). The square contains the band that appeared or intensified after lactulose intake (S2). There were three different scenarios regarding the presence of this band after lactulose ingestion: intensification (I1), appearance (I2), or remaining equally intense (I3).