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Catalytic damage of 28S rRNA in lungs of irradiated and non-irradiated mice intoxicated with ricin. Irradiated (white bars) and non-irradiated (black bars) mice were intranasally intoxicated with ricin (7 µg/kg), lungs were harvested at different time points following intoxication and catalytic damage (depurination) was quantified. n = 4.
