?:definition
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OBSOLETE. Any activity required for the process of mRNA cleavage. [GOC:mah, PMID:10357856]
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The targeted, endonucleolytic cleavage of a pre-mRNA, required for polyadenylation of the 3\' end. This cleavage is directed by binding sites near the 3\' end of the mRNA and leaves a 3\' hydoxyl end which then becomes a target for adenylation. [http://www.ncbi.nlm.nih.gov/books/NBK21563/#_A2878_]
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