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DGGE band patterns of PCR-amplified 16S rRNA fragments obtained by using cyanobacterium-specific primers and the Wadi Gaza field microbial mats (lane WG) and mats collected at the end of the experiments from the microbiological controls (lanes G and GC) and from preparations incubated in the light (lane L) and in the dark (lane D). The labeled bands were excised, reamplified, and sequenced.
