?:definition
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The chemical reactions and pathways occurring in the nucleus and resulting in the breakdown of a cryptic unstable transcript (CUT), initiated by the enzymatic addition of a sequence of adenylyl residues (polyadenylation) at the 3\' end the target CUT. [GOC:dgf, GOC:krc, PMID:15935759, PMID:16973436, PMID:16973437, PMID:18007593, PMID:18591258]
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