| 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 |
| reading-frameshift mutation | <molecular biology> A type of mutation that results from insertion or deletion of a single nucleotide into, or from, an open reading frame in the normal DNA sequence. Normally, the genetic code is read in the wrong frame, three nucleotides at a time, and the entire sequence downstream of the mutation, is translated into a polypeptide with a garbled amino acid sequence from the mutated codon onwards. These mutations may be induced by certain types of mutagens or may occur spontaneously and usually result in the generation, downstream, of nonsense, chain termination codons. Synonym: addition mutation, addition-deletion mutation, deletion mutation, reading-frameshift mutation. (21 Jun 2000) |
|---|---|
| frameshift | <molecular biology> A shift in the reading frame used to translate the base sequence of DNA or mRNA. It is caused by the addition or deletion of one or more of the bases, resulting in an alternative peptide being formed. (17 Dec 1997) |
| frameshift mutagen | <molecular biology> A mutagen, such as an acridine derivative, that causes a frameshift mutation; codons (base triplets) are read out of phase and different amino acids are made. (05 Mar 2000) |
| frameshift mutation | <molecular biology> A type of mutation that results from insertion or deletion of a single nucleotide into, or from, an open reading frame in the normal DNA sequence. Normally, the genetic code is read in the wrong frame, three nucleotides at a time, and the entire sequence downstream of the mutation, is translated into a polypeptide with a garbled amino acid sequence from the mutated codon onwards. These mutations may be induced by certain types of mutagens or may occur spontaneously and usually result in the generation, downstream, of nonsense, chain termination codons. Synonym: addition mutation, addition-deletion mutation, deletion mutation, reading-frameshift mutation. (21 Jun 2000) |
| 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) |
| RNA, ribosomal, 23s | Constituent of 50s subunit of prokaryotic ribosomes containing about 3200 nucleotides. 23s rrna is involved in the initiation of polypeptide synthesis. (12 Dec 1998) |
| RNA, ribosomal, 28s | Constituent of the 60s subunit of eukaryotic ribosomes. 28s rrna is involved in the initiation of polypeptide synthesis in eukaryotes. (12 Dec 1998) |
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