Comparative X-Ray Sensitivities of Related Respiring and Fermenting Yeasts

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Abstract
Respiring and acriflavin-derived fermenting haploid yeasts have approximately the same radiation response as measured by cell survival under a variety of modifying agents, used both singly and in combination, including anoxia, phase-state change from liquid to frozen (at -9.4[degree]C), and various respiratory inhibitors. The similarity of the O2 effect in the 2 strains is evidence that this effect is not primarily mediated through enzymatic respiratory mechanisms. Small differences in the radiation response in the 2 strains are probably not due to differences in the amount or organization of the cellular water but could be due to metabolic effects such as different growth rates.