FIG 1 .

Synergistic enhancement of UV sensitivity of rad14Δ cells in the absence of Mec1 and Rad53. Survival after UV irradiation of wild-type strain EMY74.7 and its isogenic derivative strains: sml1Δ mec1Δ strain (A), sml1Δ rad53Δ strain (B), sml1Δ mec1Δ rad14Δ strain (C), and sml1Δ rad53Δ rad14Δ strain (D). Survival curves represent averages of at least three different experiments for each strain. Error bars represent standard deviations of determinations. The apparent absence of error bars in some cases is because the error bars are very small.