Poly(U) binds to globin mRNA in 0.1m-NaCl. Studies with ribonuclease digestion of this complex suggest that there are polyadenylate-rich sequences in the mRNA containing about 30–40 adenylate residues. The sequences appear to be homogenous and of approximately the same length for both α- and β-globin mRNA. They are most likely located at the 3′ terminus of the molecule.

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