| 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) |
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| nifedipine | <drug> A calcium channel blocker (346 D) used experimentally and as a coronary vasodilator. (18 Nov 1997) |
| nifedipine oxidase | <enzyme> Cytochrome p-450 isozyme induced by pregnenolone 16alpha-carbonitrile Registry number: EC 1.14.99.- Synonym: cytochrome p-450(pcn1), cytochrome p-450 hpcn3, cytochrome p450p, cytochrome IIIa1, cytochrome p-450 (pcna), cytochrome p-450 3a4, cyt p450 3a4, cytochrome p450 3a1, cyp3a1, cyp3a4, p450 3a4, cytochrome p-450(pcn) (26 Jun 1999) |
| dental caps | <veterinary> Deciduous cheek teeth in the horse which remain attached to erupting permanent teeth. (05 Mar 2000) |