Pulsed-field gel electrophoretic analyses comparing chromosomal damage and killing after no treatments and after 30-min phleomycin treatments. Diploid genotypes with respect to BLM10 and BLM3 were BLM10/BLM10, BLM3/BLM3; blm10Δ/blm10Δ, BLM3/BLM3; and BLM10/BLM10, blm3-1/blm3-1. Treated populations were divided and incubated under nongrowing conditions for 24 or 48 hr, during which competent strains can reconstruct their chromosomes (Moore et al. 2000). Routine microscopic examination and visual counting of cells before and after these LH periods confirmed cell populations did not bud or grow, and cell lysis was never observed. (A) Lanes 1, 4, 7, and 10, no LH. Lanes 2, 5, 8, and 11, 24-hr LH. Lanes 3, 6, 9 and 12, 48-hr LH. (B) Lanes 1, 4, 7, no LH. Lanes 2, 5, 8, 24-hr LH. Lanes 3, 6, 9, 48-hr LH. Corresponding survival data: squares, 0 LH; inverted triangles, 24-hr LH; triangles, 48-hr LH. Pulsed-field gel electrophoreses and survival analyses are representative of three independent experiments and of multiple diploid constructions of the same genotypes.