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Truncation of the Pab1p C terminus affects poly(A) length control in vivo. mRNA poly(A) tail lengths were determined in wild-type or pab1 strains bearing a carboxy-terminal truncation (C-termΔ). The resulting autoradiograph (A) was analyzed by densitometric tracing (B). Numbers of adenylate residues were determined by comparison with a DNA sequence ladder.
