| RNA | Ribo-Nucleic Acid |
|---|---|
| RNA | radionuclide angiography; Registered Nurse Anesthetist; ribonucleic acid; rough, noncapsulated, avirulent [bacterial culture] |
| RNAA | radiochemical neutron activation analysis |
| RNAse, RNase | ribonuclease |
| HARS | histidyl-RNA synthetase |
|---|---|
| poly-IC, | poly-I:C copolymer of polyinosinic and polycytidylic acids; synthetic RNA polymer |
| U-RNA | uridylic acid ribonucleic acid |
| RNA | B-ribonucleic acid |
|---|---|
| RNA | Radionuclide Angiography |
| RNA | Radionuclide angiocardiography |
| RNA | Renal nerve activity |
| RNA | Renal sympathetic nerve activity |
| RNAA | Radiochemical Neutron Activation Analysis |
| RNAase | Ribonuclease |
| RNAi | RNA interference |
| RNAi | RNA-mediated interference |
| RNAP | RNA polymerease |
| D RNA | defective RNA |
|---|---|
| HCV RNA | Hepatitis C virus RNA |
| hn-RNA | Heteronuclear RNA |
| I-RNA | Immune RNA |
| poly(A)+ RNA | Polyadenylated RNA |
| 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) |
|---|---|
| RNA 2'-O-methyltransferase | <enzyme> Methylates 2'-hydroxyl group of ribose moieties of ribosomal RNA; highest activity poly (c) is a synthetic substrate Registry number: EC 2.1.1.- Synonym: nucleolar 2'-o-methyltransferase (26 Jun 1999) |
| RNA 3'-terminal phosphate cyclase | <enzyme> ATP dependent; forms 2',3' terminal cyclic phosphate on RNA which is then the substrate for RNA ligase of hela cells Registry number: EC 6.5.- Synonym: RNA tph cyclase (26 Jun 1999) |
| RNA cap analogs | Analogs of RNA cap compounds which do not have a positive charge. These compounds inhibit the initiation of translation of both capped and uncapped messenger RNA. (12 Dec 1998) |
| RNA caps | Compounds with the general structure 7-methyl-5'-guanosine triphosphate-5'-x which modify the 5' end of eukaryotic cellular and viral messenger RNA and some heterogeneous nuclear rnas. These compounds, 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. (12 Dec 1998) |
| RNA editing | <molecular biology> Specific alterations of RNAs, for example C_V changes that are not coded for in the genes. (23 Aug 1998) |
| RNA enzyme | <molecular biology> Often referred to as RNA with catalytic capacity, an enzyme made of nucleic acid not protein that catalyse chemical reactions, often the breakdown of other RNAs. Of particular interest because of the implications for self replicating systems in the earliest stages of the evolution of (terrestrial) life. Their discovery in the mid-1980s refuted the concept that only proteins could be biological catalysts. There is potential for their use as pharmaceuticals and industrial catalysts. (13 Nov 1997) |
| RNA helicase | <enzyme> Nuclear envelope-associated RNA helicase activity in nucleocytoplasmic RNA transport; both glh-1 and glh-2 contain cchc-type zinc fingers; xp54 is xenopus homologue of human RNA helicase p54 Registry number: EC 2.7.7.- Synonym: RNA duplex unwindase, p54 gene product, bat1 gene product, RNA helicase a, rok1 protein, human RNA helicase 1, hrh1 protein, mrdb protein, glh-1 protein, glh-2 protein, RNA helicase p54, xp54, u5 snrnp-specific 100-kD protein (26 Jun 1999) |
| RNA life | <biology, molecular biology> A hypothetical life form lacking DNA and protein which may have existed on early earth and in which RNA served both a genetic coding and a catalytic function. (23 Aug 1998) |
| RNA ligase | <enzyme> An enzyme that catalyses the conversion of linear RNA to a circular form by the transfer of the 5'-phosphate to the 3'-hydroxyl terminus. It also catalyses the covalent joining of two polyribonucleotides in phosphodiester linkage. Chemical name: Poly(ribonucleotide):poly(ribonucleotide)ligase (AMP-forming) Registry number: EC 6.5.1.3 (12 Dec 1998) |
| RNA N-glycosidase | <enzyme> Catalyses hydrolysis of a single adenosine glycosidic bond; probable cause of toxic effect of vero toxin from E coli by inactivating 60s ribosomal subunit Registry number: EC 3.2.2.- Synonym: RNA glycosylase (26 Jun 1999) |
| RNA nucleotidyltransferases | <enzyme> Enzymes that catalyze the template-directed incorporation of ribonucleotides into an RNA chain. Registry number: EC 2.7.7. (12 Dec 1998) |
| RNA phages | Bacteriophages whose genetic material is RNA, which is single-stranded in all except the pseudomonas phage phi6. All RNA phages infect their host bacteria via the host's surface pili. Some frequently encountered RNA phages are: qbeta, ms2, bf23, f2, r17, fr, mu2, phicb5, phicb12r, phicb8r, phicb23r, 7s, phi6, pp7. (12 Dec 1998) |
| RNA plasmid | <molecular biology> DsRNA found in yeasts, also called killer factors. Their nomenclature is uncertain and some scientists consider them viruses. (23 Aug 1998) |
| RNA polymerase | <enzyme, molecular biology> An enzyme that polymerise ribonucleotides in accordance with the information present in DNA. Prokaryotes have a single enzyme for the three RNA types that is subject to stringent regulatory mechanisms. Eukaryotes have type I that synthesises all rRNA except the 5S component, type II that synthesises mRNA and hnRNA and type III that synthesises tRNA and the 5S component of rRNA. (23 Aug 1998) |
| acceptor RNA | rNA |
|---|---|
| antisense RNA | <molecular biology> A complementary RNA sequence that binds to (and thus blocks the transcription of) a naturally-occuring (sense) messenger RNA molecule. These proteins can be used to selectively turn off production of certain proteins or block viral genetic instructions, by marking them for destruction by cellular enzymes, in order to prevent the building of new virus or the infection of new cells. (09 Oct 1997) |
| bacteriophage T3 RNA polymerase | <enzyme> Used for the rapid generation of strand-specific RNA molecules that can be used for the identification of genes in hybridization experiments Registry number: EC 2.7.7.- Synonym: t3 RNA polymerase (26 Jun 1999) |
| cap II RNA(nucleoside-2'-)methyltransferase | <enzyme> Converts cap i-terminated mRNA to cap II-terminated mRNA Registry number: EC 2.1.1.- Synonym: cap II methylase (26 Jun 1999) |
| cap I RNA (nucleoside-2'-)methyltransferase | <enzyme> Converts cap 0-terminated mRNA to cap i-terminated mRNA Registry number: EC 2.1.1.- Synonym: cap I methylase (26 Jun 1999) |
| p68 RNA helicase | <enzyme> An RNA helicase isolated from uv-induced tumours in mice; amino acid sequence has been determined Registry number: EC 2.7.7.- Synonym: dead box helicase p68 (26 Jun 1999) |
| masked messenger RNA | <molecular biology> Long lived and stable mRNA found originally in the oocytes of echinoderms and constituting a store of maternal information for protein synthesis that is unmasked (derepressed) during the early stages of morphogenesis. In these early stages the rate of cell division is so rapid that transcription from the embryonic genome cannot occur. Undoubtedly not restricted to oocytes and the term can be applied to any mRNA which is present in inactive form. (18 Nov 1997) |
| ribosomal 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) |
| messenger-like RNA | An ill-defined form of RNA, of high molecular weight, that never leaves the nucleus and is thought to be the precursor of messenger RNA. (05 Mar 2000) |
| messenger RNA | <molecular biology> Single stranded RNA molecule that specifies the amino acid sequence of one or more polypeptide chains. This information is translated during protein synthesis when ribosomes bind to the mRNA. In prokaryotes, mRNA is normally formed by splicing a large primary transcript from a DNA sequence and protein synthesis starts while the mRNA is still being synthesised. Prokaryote mRNAs are usually very short lived (average t 1/2 is 5mins.). In contrast, in eukaryotes the primary transcripts (HnRNA) are synthesised in the nucleus and they are extensively processed to give the mRNA that is exported to the cytoplasm where protein synthesis takes place. This processing includes the addition of a 5' 5' linked 7 methyl guanylate cap at the 5' end and a sequence of adenylate groups at the 3' end, the poly A tail, as well as the removal of any introns and the splicing together of exons, only 10% of HnRNA leaves the nucleus. Eukaryote mRNAs are comparatively long lived with a half life ranging from 30minutes to 24 hours. (27 Jun 1999) |
| GTP-RNA guanylyltransferase | <enzyme> Catalyses addition of GMP residue to 3'-ends of oligonucleotide primers Registry number: EC 2.7.7.- Synonym: terminal guanylyltransferase (26 Jun 1999) |
| guide RNA | <molecular biology> Small RNA molecules that hybridise to specific mRNAs and direct their RNA editing. (18 Nov 1997) |
| chromosomal RNA | RNA associated with the chromosome (not mRNA, tRNA, or rRNA) that may have a role in transcription. (05 Mar 2000) |
| monocistronic RNA | <molecular biology> A messenger RNA that gives a single polypeptide chain when translated. All eukaryote mRNAs are monocistronic, but some bacterial mRNAs are polycistronic especially those transcribed from operons. (18 Nov 1997) |
| polymerase, DNA or RNA | Enzymes that catalyse the synthesis of nucleic acids on pre-existing nucleic acid templates, assembling RNA from ribonucleotides or DNA from deoxyribonucleotides. (05 Mar 2000) |
Synonyms : Gene Products, RNA, Non-Polyadenylated RNA, Acid, Ribonucleic, Non Polyadenylated RNA, RNA Gene Products, RNA, Non Polyadenylated
Synonyms :
Synonyms : 3' Polyadenylation Signal, AAUAAA RNA Sequence, RNA 3' Polyadenylation Signal, 3' Polyadenylation Signals, AAUAAA RNA Sequences, Polyadenylation Signal, 3', RNA Sequence, AAUAAA, Sequence, AAUAAA RNA, Sequences, AAUAAA RNA, Signals, 3' Polyadenylation
Synonyms : 5' TOP Messenger RNA, 5' TOP Sequence, 5' TOP mRNA, RNA 5' Terminal Oligopyrimidine Regulatory Sequence, 5' TOP Sequences, Sequence, 5' TOP, Sequences, 5' TOP
Synonyms : RNA Cap Analogues, Analogs, RNA Cap, Analogues, RNA Cap, Cap Analogs, RNA, Cap Analogues, RNA
| RNA |
ribonucleic acid: (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell; "ribonucleic acid is the genetic material of some viruses"
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|---|---|
| RNase |
ribonuclease: a transferase that catalyzes the hydrolysis of ribonucleic acid
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| RNA polymerase |
(RNA po
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| RNA virus |
a virus whose genome consists of RNA; called also ribovirus.
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| RNase |
(RNase) ribonuclease, sometimes used specifically to denote pancreatic ribonuclease.
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| RNA | a large nucleic acid molecule found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes |
|---|---|
| RNA | a transferase that catalyzes the hydrolysis of ribonucleic acid |
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