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Cordycepin-responsive mutant yeast strains involved in RNA synthesis and turn-over. (A–C) The indicated yeast strains were grown overnight in synthetic complete (SD) medium at the appropriate temperature. Tenfold serial dilutions were produced and spotted on media lacking or containing cordycepin and grown for 3–5 d. Unless indicated otherwise, the cordycepin concentration used was 20 μg/mL.
