| RNA tumour viruses | Virus's of the subfamily Oncovirinae. (05 Mar 2000) |
|---|---|
| RNA virus | A group of virus's in which the core consists of RNA; a major group of animal virus's that includes the families Picornaviridae, Reoviridae, Togaviridae, Flaviviridae, Bunyaviridae, Arenaviridae, Paramyxoviridae, Retroviridae, Coronaviridae, Orthomyxoviridae, and Rhabdoviridae. Synonym: ribovirus. (05 Mar 2000) |
| RNA viruses | Viruses whose genetic material is RNA. (12 Dec 1998) |
| RNA, antisense | An RNA molecule which, by binding to a complementary sequence in either RNA or DNA, inhibits the function and/or completion of synthesis of the latter molecule. It is involved in various regulatory systems in vivo. Artificial antisense rnas have been used to inhibit translation of specific mRNA molecules both in living cells (eukaryotic and bacterial) and in cell-free systems. (12 Dec 1998) |
| RNA, archaeal | Ribonucleic acid in archaea having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
| RNA, bacterial | Ribonucleic acid in bacteria having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
| RNA, catalytic | RNA which contains an intron sequence that has an enzyme-like catalytic activity. This intron sequence has been shown to fold up to form a complex surface that can function like an enzyme in reactions with other RNA molecules and thus synthesise new molecules even in the absence of protein. (12 Dec 1998) |
| RNA, chloroplast | Ribonucleic acid in chloroplasts having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
| RNA, complementary | Synthetic transcripts of a specific DNA molecule or fragment, made by an in vitro transcription system. This crna can be labelled with radioactive uracil and then used as a probe. (12 Dec 1998) |
| RNA, double-stranded | RNA consisting of two strands as opposed to the more prevalent single-stranded RNA. most of the double-stranded segments are formed from transcription of DNA by intramolecular base-pairing of inverted complementary sequences separated by a single-stranded loop. Some double-stranded segments of RNA are normal in all organisms. (12 Dec 1998) |
| RNA, fungal | Ribonucleic acid in fungi having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
| RNA, guide | Small kinetoplastid mitochondrial RNA that plays a major role in RNA editing. These molecules form perfect hybrids with edited mRNA sequences and possess nucleotide sequences at their 5'-ends that are complementary to the sequences of the mRNA's immediately downstream of the pre-edited regions. (12 Dec 1998) |
| RNA, helminth | Ribonucleic acid in helminths having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
| RNA, heterogeneous nuclear | Nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesised and degraded within the cell nucleus. Some heterogeneous nuclear RNA may be a precursor to mRNA. However, the great bulk of total hnrna hybridises with nuclear DNA rather than with mRNA. (12 Dec 1998) |
| RNA, nuclear | RNA molecules found in the nucleus either associated with chromosomes or in the nucleoplasm. (12 Dec 1998) |