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Total mass of DNA recovered by direct extraction of a liquid bacterial culture or extraction of an equivalent volume of culture collected on three types of filters (0.02-μm or 0.2-μm AAO and 0.2-μm PES). These assays were conducted with the forward-flush (FF) and back-flush (BF) methods using either the MasterPure complete DNA and RNA purification kit (Epicentre) or the DNeasy blood and tissue kit (Qiagen). Values shown are means and standard deviations from triplicate assays.
