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DGGE patterns of DNA, amplified with primers for mxaF and pmoA, from selected methanotrophic strains (first four lanes), the high-affinity enrichment culture (grown on <275 ppmv of CH4), the methanotrophic isolate LR1, a coculture of LR1 with a Variovorax sp., and a Hyphomicrobium sp. isolated from the enrichment culture.
