| nucleoliform | Resembling a nucleolus. Synonym: nucleoloid. (05 Mar 2000) |
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| nucleolin | <protein> A major nucleolar protein (100 kD) that functions as a shuttle protein between nucleus and cytoplasm and is also found on the cell surface. Nucleolin binds midkine and heparin binding growth associated molecule (HB GAM). Medline 1995 (18 Nov 1997) |
| nucleoloid | Synonym: nucleoliform. Origin: nucleolus + G. Eidos, resemblance (05 Mar 2000) |
| nucleolonema | The irregular network or rows of fine ribonucleoprotein granules or microfilaments forming most of the nucleolus. Origin: nucleolus + G. Nema, thread (05 Mar 2000) |
| nucleolus | <cell biology> A small dense body (sub organelle) within the nucleus of eukaryotic cells, visible by phase contrast and interference microscopy in live cells throughout interphase. Contains RNA and protein and is the site of synthesis of ribosomal RNA. The nucleolus surrounds a region of one or more chromosomes (the nucleolar organiser) in which are repeated copies of the DNA coding for ribosomal RNA. (18 Nov 1997) |
| nucleolus organiser | <molecular biology> Loop of DNA that has multiple copies of rRNA genes. See: nucleolus. (18 Nov 1997) |
| nucleolus organiser region | The chromosome region which is active in nucleolus formation and which functions in the synthesis of ribosomal RNA. (12 Dec 1998) |
| nucleomicrosome | One of the minute particles or granules making up the substance of the cell nucleus. Synonym: nucleomicrosome. Origin: karyo-+ G. Mikros, small, + soma, body (05 Mar 2000) |
| nucleon | <physics> Any particle found in the structure of an atomic nucleus, i.e., neutron or proton. (16 Dec 1997) |
| 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) |
| 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) |
Synonyms : Transport Proteins, Nucleocytoplasmic
Synonyms : Nucleolar Organizers, Nucleolus Organizer Regions, Organizer Region, Nucleolus, Organizer Regions, Nucleolus, Organizer, Nucleolar, Organizers, Nucleolar, Region, Nucleolus Organizer, Regions, Nucleolus Organizer
Synonyms : Nuclear Polyhedrosis Viruses, Nucleopolyhedroviruses, Polyhedrosis Virus, Nuclear, Polyhedrosis Viruses, Nuclear, Virus, Nuclear Polyhedrosis, Viruses, Nuclear Polyhedrosis
Synonyms : Nucleoprotein
Synonyms : Deaminases, Nucleoside
| nucleus |
(L. nucleus, kernel of a nut) A dense protoplasmic-membrane-bound region of a eukaryotic cell that contains the chromosomes separated from the cytoplasm by a membrane; present in all eukaryotic cells except mature sieve-tube elements.
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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| nucleoside analogue |
A synthetic molecule that resembles a naturally occurring nucleoside, but that lacks the bond site needed to link it to an adjacent nucleotide. See nucleoside.
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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| nucleolar organizer |
(NO); nucleolar organizer region (NOR) A chromosomal segment containing genes that encode ribosomal RNA; located at the secondary constriction of some chromosomes.
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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| nuclear transfer |
A technology by which animals are created by cloning a single diploid somatic cell. It involves taking a single diploid cell from a culture of cells, and inserting it into an enucleated ovum, ie, an ovum from which the haploid nucleus has been removed. The resultant diploid ovum develops into an embryo that is placed in a recipient female, which gives birth to the cloned animal in the normal manner. ...
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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| nuclein |
The term used by Friedrich Miescher to describe the nuclear material he discovered in 1869, which today is known as DNA.
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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