. "\"The process involved in retention of aberrant or improperly formed mRNAs, e.g. those that are incorrectly or incompletely spliced or that have incorrectly formed 3'-ends, within the nucleus at the site of transcription.\" [GOC:dgf, GOC:krc, PMID:11586364, PMID:12417728, PMID:14718167, PMID:18644474]" . . "nuclear retention of pre-mRNA at the site of transcription" . . . . . . . . . . . . . .