Growth rates of mutant strains. Yeast strains were streaked onto YEPD media and incubated at 30°C for 2 days. BER, BER-rad52, BER-rev3, and BER-rad1 represent the ntg1 ntg2 apn1, ntg1 ntg2 apn1 rad52, ntg1 ntg2 apn1 rev3, and ntg1 ntg2 apn1 rad1 mutants, respectively. WT, wild type.