| ribonucleoside | <biochemistry> A nucleoside in which purine or pyrimidine base is linked to a ribose molecule. (09 Oct 1997) |
|---|---|
| ribonucleoside diphosphate reductase | <enzyme> An enzyme of the oxidoreductase class that catalyses the formation of 2'-deoxyribonucleotides from the corresponding ribonucleotides using NADPH as the ultimate electron donor. The deoxyribonucleoside diphosphates are used in DNA synthesis. Chemical name: 2'-Deoxyribonucleoside-diphosphate:oxidised-thioredoxin 2'-oxidoreductase Registry number: EC 1.17.4.1 (12 Dec 1998) |
| ribonucleoside-triphosphate reductase | <enzyme> Requires a cobamide coenzyme and ATP Registry number: EC 1.17.4.2 Synonym: rtp reductase (26 Jun 1999) |
| ribonucleosides | Nucleosides in which the purine or pyrimidine base is combined with ribose. (12 Dec 1998) |
| ribonucleotide | <biochemistry> A nucleotide in whicha purine or pyrimidine base is linked to a ribose molecule. (09 Oct 1997) |
| ribonucleotide polymerase | <enzyme> DNA-dependent Registry number: EC 2.7.7.- Synonym: oligonucleotide polymerase, decaribonucleotide polymerase (26 Jun 1999) |
| ribonucleotide reductase | A protein complex that converts ribonucleotide diphosphates (NDPs) such as ADP and CDP to 2'-deoxyribonucleotide diphosphates (dNDPs) such as dADP and dCDP. This complex requires thioredoxin, thioredoxin reductase, and NADPH. It is crucial for DNA synthesis. (05 Mar 2000) |
| ribonucleotide reductases | <enzyme> Registry number: EC 1.17.4 (12 Dec 1998) |
| ribonucleotides | Nucleotides in which the purine or pyrimidine base is combined with ribose. (12 Dec 1998) |
| ribophage | A bacteriophage that hasan RNA-based genetic structure. (09 Oct 1997) |
| ribophorin | <protein> Glycoproteins of the endoplasmic reticulum that interact with ribosomes whilst co translational insertion of membrane or secreted proteins is taking place. Ribophorins may form a pore through which the nascent polypetide chain passes. (18 Nov 1997) |
| ribophorins | Ribosome receptor proteins that interact specifically with the large ribosomal subunit and aid in translocation of newly synthesised proteins across the endoplasmic reticulum. Origin: ribonucleic acid + G. Phoros, carrying, + -in (05 Mar 2000) |
| riboprine | <drug> An anti-cancer drug. (09 Oct 1997) |
| riboprobe | Somewhat casual term for an RNA segment used to probe for a complementary nucleotide sequence either in the mRNA pool or in the DNA of a cell. (18 Nov 1997) |
| ribopyranose | The 1,5-cyclic form of ribose. (05 Mar 2000) |