uvrD303 cells are defective in RecA-dependent repair (not NER) in response to UV treatment. (A) Circles, wild type (JC13509); squares, del(uvrD-yigE)::cat (SS3368); triangles, uvrD303 (SS5704). Survival was measured for untreated cells and at doses of 10, 20, and 60 J/m2 UV light. (B) Filled squares, del(recA-srl)306::Tn10 (JC19328); filled triangles, del(uvrA)100::kan (SS5766); open triangles, uvrD303 (SS5704); open circles, del(uvrA)100::kan uvrD303 (SS5764); filled circles, del(uvrA)100::kan del(recA-srl)306::Tn10 (SS5769); open squares, del(recA-srl)306::Tn10 uvrD303 (SS5756). Survival was measured for untreated cells and at doses of 0.8, 2, and 4 J/m2 UV light. Each data point represents the average for at least three independent experiments, and error bars represent standard deviations.