| n | 1. Symbol for newton; nitrogen; asparagine; nucleoside, refractive index, nano-; reaction order 2. Designation for an inherited blood factor. See MNSs blood group, Blood Groups appendix. 3. The number in a scientific study. Sample size. (05 Mar 2000) |
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| N chimaerin | <protein> A phorbol ester / diacyl glycerol binding protein found in brain. A GTPase activating protein for rac. (18 Nov 1997) |
| N glycanase | <enzyme> That cleaves asparagine linked oligosaccharides from glycoproteins. 2, genezyme newsletter2 (18 Nov 1997) |
| N line | <cell biology> Regions in the sarcomere of striated muscle. The N1 line is in the I band near the Z disc, the N2 line is at the end of the A band. The N lines may represent the location of proteins such as nebulin that contribute to the stability of the sarcomere. (18 Nov 1997) |
| N methyl D aspartate receptor | <physiology> Glutamate receptor sub type (see excitatory amino acids). N methyl D aspartate receptor channels seem to be potentiated by intracellular arachidonic acid. Acronym: NMDA (26 Mar 1998) |
| N myc | <oncogene> Oncogene, related to myc, found in neuroblastomas. (18 Nov 1997) |
| N protein | 1. Antiterminator protein of the bacteriophage _ and other phages that plays a key role in the early stages of infection. During the early phase, only two genes N and cro are transcribed, by transcription of the DNA in opposite directions. N protein binds to sites on the DNA (nut sites for N utilisation), prevents rho dependent termination and allows transcription of the genes. 2. Name was once used for GTP-binding proteins G-proteins), now obsolete and should be avoided because of confusion with N protein of bacteriophages. (18 Nov 1997) |
| N&vepsilon;-trimethyllysine | An amino acid residue found in a number of proteins by the action of S-adenosyl-l-methionine on l-lysyl residues; upon release by proteolysis, N&vepsilon;-trimethyllysine becomes the precursor of carnitine. (05 Mar 2000) |
| N(2),N(2)-dimethylguanosine-26-methyltransferase | <enzyme> Catalyses the transfer of two methyl groups to guanosine at position 26 of trna; see also record for dmg trna methyltransferase Registry number: EC 2.1.1.- Synonym: trm1 gene product, n(2),n(2)-dimethylg26-methyltransferase, trm1p (26 Jun 1999) |
| N(2),N(2)-dimethylguanosine-specific tRNA methyltransferase | <enzyme> Responsible for the modification of both mitochondrial and cytoplasmic trnas Registry number: EC 2.1.1.- Synonym: dmg trna methyltransferase (26 Jun 1999) |
| N(2)-succinylarginine dihydrolase | <enzyme> Catalyses conversion of n(2)-succinylarginine to n(2)-succinylornithine, ammonium, and carbon dioxide; member of catabolic arginine succinyltransferase pathway; isolated from pseudomonas aeruginosa; genbank af011922 Registry number: EC 3.5.3.- Synonym: arub gene product, sadh enzyme (26 Jun 1999) |
| N(2)-succinylornithine 5-aminotransferase | <enzyme> Catalyses conversion of n(2)-succinylornithine and 2-ketoglutarate to n-succinylglutamate saemialdehyde and l-glutamate; member of catabolic arginine succinyltransferase pathway; isolated from pseudomonas aeruginosa; genbank af011922 Registry number: EC 2.6.1.- Synonym: aruc gene product, soat enzyme (26 Jun 1999) |
| N(5)-(carboxyethyl)ornithine synthase | <enzyme> From lactococcus lactis k1; NADPH-dependent; catalyses the synthesis of n5-ceo from pyruvic acid and l-ornithine Registry number: EC 1.5.1.24 Synonym: nceo synthase (26 Jun 1999) |
| N(6)-(6-carbamoylhexyl)-FAD-D-amino acid oxidase | <enzyme> A semi-synthetic oxidase; prepared by reacting the succinimido ester of n(6)-(6-carboxyhexyl)-fad with apo-d-amino acid oxidase from pig kidney in the presence of the benzoate Registry number: EC 1.4.3.- Synonym: nch-fad-daao (26 Jun 1999) |
| N(epsilon)-(gamma-glutamyl)lysine hydrolase | <enzyme> Enzyme which is capable of directly hydrolyzing the cross-linked isopeptide into amino acids Registry number: EC 3.4.99.- Synonym: n(epsilon)-(gamma-glutamyl)lysine peptidase, ggl peptidase (26 Jun 1999) |