Figure 2.
Deletion of LYS20 and LYS21 suppresses htz1Δ DNA damage sensitivity. (A) Resistance to camptothecin is dependent on ESA1. Strains were assayed as in Figure 1. The YPD-based camptothecin (CPT) plate contains 40 μg/mL camptothecin in DMSO. (B) Deletion of LYS20 and LYS21 suppresses htz1Δ DNA damage sensitivity. All plates were incubated at 33°C. All plates are YPD-based. The camptothecin (CPT) plates contain 20 μg/mL camptothecin in DMSO, and were incubated 5 d longer than the growth control. (C) Suppression is dependent on ESA1. Independent strain isolates were assayed as in Figure 1. Plates were incubated at 30°C. All plates are YPD-based. The camptothecin (CPT) plate contains 20 μg/mL camptothecin in DMSO. Vertical bars indicate platings of two independent triple mutants. (D) Suppression is evident with HU-induced damage. Strains were assayed as before on YPD or synthetic complete as growth control, or on 0.1 M HU. The HU plate was incubated an additional 3 d in the top panel, and an additional 5 d in the bottom panel. Plates were incubated at 30°C. Vertical bars indicate platings of two independent triple mutants.