《英文msh词典》RNA,Messenger,Precursors
[同义词] RNA,Messenger,Precursors
[主题词] RNA Precursors
[中文释义] RNA,信使,前体
[英文释义] 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.