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18S rRNA PCR amplification products obtained from landfill sites. Lane 1, GeneRuler 100-bp DNA Ladder Plus (MBI Fermentas); lane 2, Neocallimastix frontalis; lane 3, Rhizopus stolonifera; lane 4, dH2O; lanes 5 to 9, samples taken from five of the Drigg gas vent pipes.
