- 《英文msh詞典》Precursor,RNA
- [入口詞] Precursor,RNA
- [主題詞] RNA Precursors
- [英文釋義] RNA transcripts of the DNA that are in some unfinished stage of post-transcriptional processing (RNA PROCESSING,POST-TRANSCRIPTIONAL) required for function. RNA precursors may undergo several steps of RNA SPLICING during which the phosphodiester bonds at exon-intron boundaries are cleaved and the introns are excised. Consequently a new bond is formed between the ends of the exons. Resulting mature RNAs can then be used; for example,mature mRNA (RNA,MESSENGER) is used as a template for protein production.
下載手機詞典可隨時隨地查詞查翻譯