| RNA | Ribo-Nucleic Acid |
|---|---|
| HARS | histidyl-RNA synthetase |
| poly-IC, | poly-I:C copolymer of polyinosinic and polycytidylic acids; synthetic RNA polymer |
| RNA | radionuclide angiography; Registered Nurse Anesthetist; ribonucleic acid; rough, noncapsulated, avir... |
| U-RNA | uridylic acid ribonucleic acid |
| D RNA | defective RNA |
|---|---|
| HCV RNA | Hepatitis C virus RNA |
| hn-RNA | Heteronuclear RNA |
| I-RNA | Immune RNA |
| poly(A)+ RNA | Polyadenylated RNA |
| puff | 1. To blow in puffs, or with short and sudden whiffs. 2. To blow, as an expression of scorn; with at. "It is really to defy Heaven to puff at damnation." (South) 3. To breathe quick and hard, or with puffs, as after violent exertion. "The ass comes back again, puffing and blowing, from the chase." (L' Estrange) 4. To swell with air; to be dilated or inflated. 5. To breathe in a swelling, inflated, or pompous manner; hence, to assume importance. "Then came brave Glory puffing by." (Herbert) Origin: Akin to G. Puffen to pop, buffet, puff, D. Poffen to pop, puffen to blow, Sw. Puffa to push, to cuff, Dan. Puffe to pop, thump. See: Puff. 1. A sudden and single emission of breath from the mouth; hence, any sudden or short blast of wind; a slight gust; a whiff. " To every puff of wind a slave." 2. Anything light and filled with air. Specifically: A puffball. Kind of light pastry. A utensil of the toilet for dusting the skin or hair with powder. 3. An exaggerated or empty expression of praise, especially one in a public journal. Puff adder. <medicine> Any bird of the genus Bucco, or family Bucconidae. They are small birds, usually with dull-coloured and loose plumage, and have twelve tail feathers. See: Barbet . Origin: Akin to G. & Sw. Puff a blow, Dan. Puf, D. Pof; of imitative origin. Cf. Buffet. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| puff-leg | <ornithology> Any one of numerous species of beautiful humming birds of the genus Eriocnemis having large tufts of downy feathers on the legs. Source: Websters Dictionary (01 Mar 1998) |
| puff-legged | <zoology> Having a conspicuous tuft of feathers on the legs. Source: Websters Dictionary (01 Mar 1998) |
| DNA puff | <molecular biology> An area on a chromosome where transcription of DNA into mRNA, or replication of DNA is occurring, resulting in an enlarged, puffy appearance of the area. Similar to chromosome puff, except generalised to any type of chromosome in any type of organism. (09 Oct 1997) |
| 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) |
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