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2 words
polycistronic mRNA ARNm polycistronique
 
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Definition
 
enEnglish
precursor mRNA definition: newly transcribed RNA fully complementary to the DNA sequence of structural genes; this component of the spliceosome and hnRNA is spliced, 5' capped, 3' polyadenylated, transported to the cytoplasm as mature mRNA, and translated.
RNA Caps definition: Nucleic acid structures found on the 5' end of eukaryotic cellular and viral messenger RNA and some heterogeneous nuclear RNAs. These structures, which are positively charged, protect the above specified RNAs at their termini against attack by phosphatases and other nucleases and promote mRNA function at the level of initiation of translation. Analogs of the RNA caps (RNA CAP ANALOGS), which lack the positive charge, inhibit the initiation of protein synthesis.
RNA, Heterogeneous Nuclear definition: Nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesized and degraded within the cell nucleus. Some heterogeneous nuclear RNA may be a precursor to mRNA. However, the great bulk of total hnRNA hybridizes with nuclear DNA rather than with mRNA.
heterogeneous nuclear RNA definition: nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesized and degraded within the cell nucleus; some heterogeneous nuclear RNA may be a precursor to mRNA, however, the great bulk of total hnRNA hybridizes with nuclear DNA rather than with mRNA.
hnRNA definition: The name originally given to large RNA molecules found in the nucleus, which are now known to be unedited messenger RNA transcripts, or pre-mRNAs. (BioTech Life Science Dictionary)
RNA, Messenger definition: RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.
messenger RNA definition: RNA sequences that serve as templates for protein synthesis; eukaryotic messenger RNA is synthesized in the nucleus and must be exported to the cytoplasm for translation.
Messenger RNA definition: A class of RNA molecule containing protein-coding information in its nucleotide sequence that can be translated into the amino acid sequence of a protein.
genetic translation definition: ribosome mediated process by which polypeptide chains are synthesized, the aminoacid sequence being completely determined by the sequence of bases in a messenger RNA, which in turn is determined by the sequences of bases in the DNA of the gene from which it was transcribed.
translation definition: The chemical reactions and pathways resulting in the formation of a protein. This is a ribosome-mediated process in which the information in messenger RNA (mRNA) is used to specify the sequence of amino acids in the protein. [GOC:go_curators]
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