Abstract
Abstract— Recovery from sublethal damage by u.v. irradiation as measured by the split‐dose technique was investigated in stationary phase populations of diploid yeast Saccharomyces cerevisiae. Ft has been found that only about 35 per cent of the irradiated population is able to undergo recovery before the first subsequent cell division. The qualitative pattern is not changed if maximum photoreactivation is allowed after the first dose. Measurements of the decay of photoreactibility show that primary photo‐products are still present up to six hours after irradiation.
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