| nuclear RNA | <molecular biology> The nucleus contains RNA that has just been synthesised, but in addition there is some that seems not to be released or is only released after further processing, the heterogenous nuclear RNA (hnRNA) and small RNA molecules associated with protein to form small nuclear ribonucleoproteins. (18 Nov 1997) |
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| DNA-directed RNA polymerase | <enzyme> A group of enzymes that catalyses DNA template-directed extension of the 3'-end of an RNA strand one nucleotide at a time. They can initiate a chain de novo. In eukaryotes, three forms of the enzyme have been distinguished on the basis of sensitivity to alpha-amanitin, and the type of RNA synthesised. Chemical name: Nucleoside-triphosphate:RNA nucleotidyltransferase (DNA-directed) Registry number: EC 2.7.7.6 (12 Dec 1998) |
| DNA-RNA hybrid | Double-stranded polynucleic acids in which one strand is DNA and the other strand is the complementary RNA; formed during transcription and during multiplication of oncogenic RNA viruses. (05 Mar 2000) |
| DNA-RNA hybridisation | <molecular biology> A type of hybridisation. In this case, a strand of DNA is joined with a complementary strand of RNA to form a double-stranded molecule (or one which is partly double-stranded, if one of the original single strands is shorter than the other). (09 Oct 1997) |
| informational RNA | mRNA |
| template RNA | mRNA |
| T loop of RNA | <molecular biology> The T loop of tRNA is the region of the molecule that is responsible for ribosome recognition. (16 Dec 1997) |
| transfer RNA | <molecular biology> A nucleic acid found in all living cells. Plays a role in transferring information from DNA to the protein-forming system of the cell. (16 Dec 1997) |
| ui RNA | <molecular biology> A common type of small nuclear RNA (165 bases long) that serves to splice and/or remove exons of messenger RNA. (09 Oct 1997) |
| UTP-RNA uridylyltransferase | <enzyme> Catalyses addition of single ump residue from utp to 3'-end of RNA primer Registry number: EC 2.7.7.- Synonym: terminal uridylyltransferase, ump transferase (26 Jun 1999) |
| 16S RNA pseudouridine 516 synthase | <enzyme> Acts only on uridine 516 of e. Coli 16s RNA; amino acid sequence given in first source Registry number: EC 5.4.99.- Synonym: psi516 synthase, rsua gene product (26 Jun 1999) |