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Hybridization results. (A) Autoradiograph of shotgun array after hybridization with 14C-labeled DNA in activated sludge. Arrows indicate positive controls. (B) Signal-to-noise ratios (SNR) of the probes. Asterisks above the bars indicate SNRs of >3. The probes used for verification in SIP are shown with closed bars, and arrows indicate each probe number.
