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Analysis of 16S rRNA PCR products by DGGE in control and IPU treated samples, at the point of 90% IPU degradation. Lanes: M, marker; 1 to 5, control, unamended soil; 6 to 10, IPU-treated soil. Lanes 1 to 5 and lanes 6 to 10 correspond to sites B to F in transects 1 and 2. Positions of cloned bands DS1 and DS2 indicated. (a) Transect 1; (b) transect 2.
