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Post-transcriptional modification
Post-transcriptional modification or Co-transcriptional modification is a process in cell biology by which, in eukaryotic cells, primary transcript RNA is converted into mature RNA. A notable example is the conversion of precursor messenger RNA into mature messenger RNA (mRNA), which includes splicing and occurs prior to protein synthesis. This process is vital for the correct translation of the genomes of eukaryotes because the human primary RNA transcript that is produced, as a result of transcription, contains both exons, which are coding sections of the primary RNA transcript and introns, which are the non-coding sections of the primary RNA transcript.
== mRNA processing ==
The pre-mRNA molecule undergoes three main modifications. These modifications are 5' capping, 3' polyadenylation, and RNA splicing, which occur in the cell nucleus before the RNA is translated.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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