HRAD9 expression increases cell survival of
rad9 null strains exposed to ionizing radiation, but not
to UV light. (A) Logarithmic phase S. pombe
were exposed to the indicated γ radiation doses, or (B) UV
light doses, and assayed for viability by the ability to form colonies.
Strains: rad9+ (▵),
rad9+ [pHRAD9-1] (○),
rad9::ura4+
(▴),
rad9::ura4+
[pHRAD9-1] (•). Data represent the average of three
experiments. Error bars = SD.