| nucleopetal | 1. Moving in the cell body in a direction toward the nucleus. 2. Moving in a direction toward a nerve nucleus; said of a nervous impulse. Origin: nucleo-+ L. Peto, to seek (05 Mar 2000) |
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| Nucleophaga | A microsporan parasite of amoebae which destroys the nucleus of its host. Origin: nucleo-+ G. Phago, to eat (05 Mar 2000) |
| nucleophil | Nucleophile 1. The electron pair donor atom in a chemical reaction in which a pair of electrons is picked up by an electrophil. 2. Relating to a nucleophil. Synonym: nucleophilic. Origin: nucleo-+ G. Philos, fond (05 Mar 2000) |
| nucleophile | <chemistry> A species that loves a nucleus. Since nuclei are positively charged, nucleophiles are negatively charged or bear a partial negative charge. Examples are lone pairs or a hydroxide ion. (09 Jan 1998) |
| nucleophilic | Synonym: nucleophil. 2. A reaction involving a nucleophile. (05 Mar 2000) |
| nucleophosphatases | <enzyme> A class of enzymes that catalyze the conversion of a nucleotide and water to a nucleoside and orthophosphate. Registry number: EC 3.1.3.- (12 Dec 1998) |
| nucleoplasm | <cell biology> By analogy with cytoplasm, that part of the nuclear contents other than the nucleolus. (18 Nov 1997) |
| nucleoplasmic | <biology> Of or pertaining to nucleoplasm; especially. Applied to a body formed in the developing ovum from the plasma of the nucleus of the germinal vesicle. Source: Websters Dictionary (01 Mar 1998) |
| nucleoplasmic index | The quotient of the nuclear volume divided by the cytoplasmic volume. (05 Mar 2000) |
| nucleoplasmin | <protein> First protein to be described as a molecular chaperone, major function seems to be in assembly of nucleosomes. (18 Nov 1997) |
| nucleopolyhedrovirus | A genus of the family baculoviridae, subfamily eubaculovirinae, characterised by the formation of crystalline, polyhedral occlusion bodies in the host cell nucleus. The type species is autographa californica nucleopolyhedrovirus. (12 Dec 1998) |
| Nucleopore filter | Filter of defined pore size made by etching a polycarbonate filter that has been bombarded by neutrons, the extent of etching determining the pore size. Very thin, with neat circular holes going right through the membrane, not a complex meshwork like micropore filters. (18 Nov 1997) |
| nucleoprotein | A complex of protein and nucleic acid, the form in which essentially all nucleic acids exist in nature; chromosomes and viruses are largely nucleoprotein. (05 Mar 2000) |
| nucleoproteins | Structures containing both nucleic acid and protein. Examples are chromatin, ribosomes, certain virus particles. (18 Nov 1997) |
| nucleoreticulum | The intranuclear network of chromatin or linin. Origin: nucleo-+ L. Reticulum, dim. Of rete, net (05 Mar 2000) |