5), A hundred ng of W3110 DNA, response buffer (10 mM Tris-HCl pH 8.3, 50 mM KCl, 1.5 mM MgCl2, 0.01% gelatin) and 5 items of a heat-stable Vent DNA polymerase (from Biolabs) and under the following conditions: 96° C., 1.5 min; 62° C., 1 min; 72° C., 3…