| isolecithal | Denoting an ovum in which there is a moderate amount of uniformly distributed yolk. (05 Mar 2000) |
|---|---|
| isolecithal egg | An egg in which the total amount of yolk is small and fairly uniformly distributed throughout the cytoplasm. Synonym: isolecithal egg. (05 Mar 2000) |
| isolecithal ovum | An ovum in which the yolk is evenly distributed throughout the cytoplasm. (05 Mar 2000) |
| isoleucine | <amino acid> Hydrophobic amino acid. (18 Nov 1997) |
| isoleucine hydroxylase | <enzyme> Involved in the hydroxyisoleucine biosynthesis in trigonella foenum-graecum Registry number: EC 1.14.- (26 Jun 1999) |
| isoleucine-trna ligase | <enzyme> An enzyme that activates isoleucine with its specific transfer RNA. Chemical name: L-Isoleucine:tRNA(Ile) ligase (AMP-forming) Registry number: EC 6.1.1.5 (12 Dec 1998) |
| isoleucyl | The acyl radical of isoleucine. (05 Mar 2000) |
| isoleukoagglutinin | Naturally occurring abnormal antibody in the blood of some persons with certain conditions, capable of agglutinating human leukocytes. (05 Mar 2000) |
| isoliquiritigen 2'-O-methyltransferase | <enzyme> From alfalfa (medicago sativa l.); methylates the 2'-hydroxyl group of isoliquiritigenin; inhibited by s-adenosyl-l-homocysteine Registry number: EC 2.1.1.- Synonym: 2',4,4'-trihydroxychalcone 2'-o-methyltransferase, isoli methyltransferase, chmt methyltransferase (26 Jun 1999) |
| isologous | <chemistry> Having similar proportions, similar relations, or similar differences of composition; said specifically of groups or series which differ by a constant difference; as, ethane, ethylene, an acetylene, or their analogous compounds, form an isologous series. Origin: Iso- + Gr. Proportion. Source: Websters Dictionary (01 Mar 1998) |
| isologous graft | A tissue or organ transplanted between genetically identical individuals. Synonym: isogeneic graft, isograft, isologous graft, isoplastic graft, syngeneic graft. (05 Mar 2000) |
| isolysin | An antibody that combines with, sensitises, and results in complement-fixation and dissolution of cells that contain the specific isoantigen; isolysin's occur in the blood of some members of a species and they react with the cells of that species, but not with the cells of the individual (or the same type) in which the isolysin's are naturally formed. (05 Mar 2000) |
| isolysis | Lysis or dissolution of cells as a result of the reaction between an isolysin and specific antigen in or on the cells. See: isohemolysis. Origin: iso-+ G. Lysis, dissolution (05 Mar 2000) |
| isolytic | Pertaining to, characterised by, or causing isolysis. (05 Mar 2000) |
| isomaltase | A glucanohydrolase cleaving alpha-1,6 links in isomaltose and dextrins produced from starch and glycogen by alpha-amylase; secreted into the duodenum; a deficiency of this enzyme leads to defects in intestinal digestion of limit dextrins. See: sucrose alpha-d-glucohydrolase. Synonym: isomaltase, limit dextrinase. (05 Mar 2000) |