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mRNA 3′ End Formation in Transcripts from the Activated aadA Gene in the Nucleus.
The identified polyadenylation site within the psbA 3′ UTR is indicated by a vertical arrow. The consensus sequence elements known to mediate mRNA 3′ end formation in plants are indicated underneath the psbA sequence. The A-rich element upstream of the cleavage/polyadenylation site in psbA sequence is marked in bold, and the U-rich region surrounding the site is underlined.
