| hnRNA | heterogeneous nuclear ribonucleic acid |
|---|---|
| hnRNP | heterogeneous nuclear ribonucleoprotein |
| hRNA | heterogeneous ribonucleic acid |
| NT | Nucleation time |
|---|---|
| HET | Heterogeneous |
| HS | Heterogeneous Stock |
| hn | Heterogeneous nuclear |
| hnRNA | Heterogeneous nuclear RNA |
| nucleation | <molecular biology> A general term used in polymerisation or assembly reactions where the first steps are energetically less favoured than the continuation of growth. Polymerisation is much faster if a pre formed seed is used to nucleate growth. (e.g. Microtubule growth is nucleated from the microtubule organising centre, although the nature of this nucleation is not known). (18 Nov 1997) |
|---|---|
| ice nucleation protein | <protein> Protein produced by some gram-negative bacteria that promote the nucleation of ice, apparently by aligning water molecules along repeated domains of 48 amino acids, that consist of 16 residue repeats containing the conserved octamer AGYGSTxT. Now finding commercial use in snow making at ski resorts. (18 Nov 1997) |
| RNA, heterogeneous nuclear | Nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesised and degraded within the cell nucleus. Some heterogeneous nuclear RNA may be a precursor to mRNA. However, the great bulk of total hnrna hybridises with nuclear DNA rather than with mRNA. (12 Dec 1998) |
| heterogeneous | <pathology> Composed of varied cell types. (16 Dec 1997) |
| heterogeneous catalysis | <chemistry> A form of catalysis in which the catalyst is in different physical state than the reactants. (09 Jan 1998) |
| heterogeneous nuclear 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) |
| heterogeneous radiation | Radiation consisting of different frequencies, various energies, or a variety of particles. (05 Mar 2000) |
| heterogeneous system | In chemistry, a system that contains various distinct and mechanically separable parts or phases; e.g., a suspension or an emulsion. (05 Mar 2000) |
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