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Nature Chemical Biology 5, 380–381 (1 June 2009) | doi:10.1038/nchembio0609-380

Research highlights

A couple of mRNA steps After transcription, immature mRNAs are metabolized through several processing steps, including polyadenylation, before being exported from the nucleus. For instance, a quaternary complex of mammalian poly(A)-binding protein, cleavage and polyadenylation specificity factor (CPSF), poly(A) polymerase, and RNA is active during addition of mRNA tails.