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Poly A tail length in candidate cs mRNA export mutants. Shown are the results of poly A tail length assays carried out using RNA from cells grown at 30° C (u) or incubated at 16° C for 3 hr (s). The brr3-1 strain shows a population of longer poly A tails (approximately 80-90 nt) not seen in RNA samples from wild-type cells or the other cs mutant.
