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Effects of the free radical scavenger DMSO and the thiol-depleting drug BSO on induced mutant yield in AL cells irradiated with four α-particles through the cytoplasm. Cells were treated with 8% DMSO for 10 min before and 10 min after irradiation or with 10 μm BSO for at least 18 hr before irradiation. Data were pooled from three to six experiments. Neither DMSO nor BSO was mutagenic alone. (Bars represent ± SEM.)
