| rDNA | recombinant (or ribosomal) deoxyribonucleic acid |
|---|---|
| RP | radial pulse; radiopharmaceutical; rapid processing [of film]; Raynaud phenomenon; reactive protein;... |
| RPS4Y | ribosomal protein S4, Y-linked |
| rRNA | ribosomal ribonucleic acid |
| rRNP | ribosomal ribonucleoprotein |
| ARDRA | Amplified ribosomal DNA restriction analysis |
|---|---|
| NRPS | non-ribosomal peptide synthetase |
| r | Ribosomal |
| rDNA | Ribosomal DNA |
| rRNA | Ribosomal RNA |
| molecular sieve | A gel-like material with pore sizes of such ranges as to exclude molecules above certain sizes; used in fractionating or purifying macromolecules. (05 Mar 2000) |
|---|---|
| sieve | 1. A utensil for separating the finer and coarser parts of a pulverized or granulated substance from each other. It consist of a vessel, usually shallow, with the bottom perforated, or made of hair, wire, or the like, woven in meshes. "In a sieve thrown and sifted." 2. A kind of coarse basket. <botany> Sieve cells, cribriform cells. See Cribriform. Origin: OE. Sive, AS. Sife; akin to D. Zeef, zift, OHG. Sib, G. Sieb. A. Cf. Sift. Source: Websters Dictionary (01 Mar 1998) |
| sieve bone | A horizontal lamina from which are suspended the labyrinth, on either side, and the lamina perpendicularis in the centre; it fits into the ethmoidal notch of the frontal bone and supports the olfactory lobes of the cerebrum, being pierced with numerous openings for the passage of the olfactory nerves. Synonym: lamina cribrosa ossis ethmoidalis, cribrum, sieve bone, sieve plate. (05 Mar 2000) |
| sieve graft | An obsolete term for a full-thickness skin graft taken after cutting multiple holes in it with a circular punch, thus leaving islands of skin in the donor area to heal it. (05 Mar 2000) |
| sieve plate | Perforated end walls separating the component cells (sieve elements) that make up the phloem sieve tubes in vascular plants. The perforations permit the flow of water and dissolved organic solutes along the tube and are lined with callose. The plates are readily blocked by further deposition of callose when the sieve tube is stressed or damaged. (18 Nov 1997) |
| sieve tube | The structure within the phloem of higher plants that is responsible for transporting organic material (sucrose, raffinose, amino acids, etc.) from the photosynthetic tissues (e.g. Leaves) to other parts of the plant. Made up of a column of cells (sieve elements) connected by sieve plates. (18 Nov 1997) |
| ribosomal neutral proteinase | <enzyme> Ribosomal serine proteinase from rat liver ribosomes in cryptic form Registry number: EC 3.4.21.52 Synonym: cathepsin r (26 Jun 1999) |
| ribosomal protein | <protein> Proteins present within the ribosomal subunits. In prokaryotes there are 31 proteins in the large subunit and 21 in the small subunit. Eukaryotic subunits have 50 (large subunit) and 33 (small subunit) proteins. (18 Nov 1997) |
| ribosomal proteins | Proteins found in ribosomes. They are believed to have a catalytic function in reconstituting biologically active ribosomal subunits. (12 Dec 1998) |
| ribosomal protein s6 kinase | <enzyme> A protein serine/threonine kinase which is involved in cell transformation by polyoma virus and is connected to the expression of igf2. The immunosuppressant rapamycin inhibits the activation of the kinase, leading to reduced translation of certain mRNAs and a decrease in protein synthesis. Registry number: EC 2.7.10.- (12 Dec 1998) |
| ribosomal protein S6 kinase kinase | <enzyme> Isolated from unfertilised xenopus eggs; a 41 kD enzyme that is associated, in vivo, with phosphorylation on threonine and tyrosine residues and, in vitro, with phosphorylation on serine as well Registry number: EC 2.7.1.- Synonym: rsk kinase (26 Jun 1999) |
| 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) |
| RNA, ribosomal | A component of ribosomes, ribosomal RNA functions as a non-specific site for making polypeptides. Ribosomal RNA is abbreviated rrna. (12 Dec 1998) |
| RNA, ribosomal, 16s | Constituent of 30s subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16s rrna is involved in initiation of polypeptide synthesis. (12 Dec 1998) |
| RNA, ribosomal, 18s | Constituent of the 40s subunit of eukaryotic ribosomes. 18s rrna is involved in the initiation of polypeptide synthesis in eukaryotes. (12 Dec 1998) |
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