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An aliquot of 2 µl of this suspension was added to 23 µl of PCR mixture containing 50 mM KCl, 20 mM Tris-HCl (pH 8.4), 2.5 mM MgCl2, 0.2 mM of each deoxynucleoside triphosphate (dATP, dUTP, dGTP, and dCTP) (Invitrogen Inc., Carlsbad, CA), various concentrations of the respective primers (Table 2), and 1.0 unit of Platinum Taq DNA polymerase (Invitrogen Inc., Carlsbad, CA).
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All PCR assays were performed directly from bacterial suspensions obtained after the rapid DNA extraction method. An aliquot of 2 µl of this suspension was added to 23 µl of PCR mixture containing 50 mM KCl, 20 mM Tris-HCl (pH 8.4), 2.5 mM MgCl2, 0.2 mM of each deoxynucleoside triphosphate(dATP, dUTP, dGTP, and dCTP) (Invitrogen Inc., Carlsbad, CA), various concentrations of the respective primers (Table 2), and 1.0 unit of Platinum Taq DNA polymerase (Invitrogen Inc., Carlsbad, CA).
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