...or spots were pre-cycled to decrease nonspecific amplification (94°C for 10 min, then 94°C for 45 sec, 45°C for 1 min, 72°C for 1 min for 15 cycles) in 1× GeneAmp PCR buffer (10 mM Tris-HCl, pH 8.3, 50 mM KCl, 1.5 mM MgCl2, 0.001% [w/v] gelatin) containing 0.25 ng/μL Escherichia coli genomic
DNA (Sigma...