| biotic | <biology> Having to do with living things. Something that is caused by, or produced by living things. Having to do with the biological aspects of an environment (as opposed to geological, etc. Aspects). (09 Oct 1997) |
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| biotic community | <biology, zoology> An aggregation of different species of organisms living and interacting within the same habitat. A group of fossil species which are often found together in the same sites. (19 Jan 1998) |
| biotic factors | Environmental factor's or influences resulting from the activities of living organisms, as contrasted to those resulting from climatic, geological, or other factor's. (05 Mar 2000) |
| biotic potential | <biology, ecology> The potential growth a population of living things can expect if it were living under ideal environmental circumstances. (19 Jan 1998) |
| biotic stress | <biology> Living organisms which can harm plants, such as viruses, fungi, bacteria, and harmful insects. (19 Jan 1998) |
| biotics | The science concerned with the functions of life, or vital activity and force. Origin: G. Biotikos, relating to life (05 Mar 2000) |
| biotin | <biochemistry> A prosthetic group for carboxylase enzymes. Important in fatty acid biosynthesis and catabolism and has found widespread use as a covalent label for macromolecules which may then be detected by high affinity binding of labelled avidin or streptavidin. Essential growth factor for many cells. (18 Nov 1997) |
| biotin carboxylase | <enzyme> A subunit of acetyl-CoA carboxylase Registry number: EC 6.3.4.14 (26 Jun 1999) |
| biotin sulfoxide reductase | <enzyme> Biotin sulfoxide + protein(sh)2 yields biotin + protein-s2 + h20 Registry number: EC 1.- (26 Jun 1999) |
| biotin synthetase | <enzyme> Converts dethiobiotin to biotin Registry number: EC 2.8.1.- Synonym: biotin synthase, bio2 protein, bio2 gene product (26 Jun 1999) |
| biotinidase | <enzyme> Deficiency may lead to late onset multiple carboxylase deficiency (organic acidemias); exhibits biocytin hydrolase and biotinyl-transferase activities Registry number: EC 3.5.1.12 Synonym: biocytin hydrolase, biotidinase (26 Jun 1999) |
| biotinides | Compounds of biotin; e.g., biocytin. (05 Mar 2000) |
| biotinylation | A technique whereby biotinyl groups are incorporated into molecules, either that catalyzed by holocarboxylase synthetase during enzyme biosynthesis or that undertaken in vitro to visualise specific substrates by incubating them with biotin-labelled probes and avidin or streptavidin that has been linked to any of a variety of substances amenable to biochemical assay. Biotinylated dutp is an alternative method to radioactive DNA labelling in vitro. (12 Dec 1998) |
| biotinyllysine | <protein> The amino acid residue formed when biotin links covalently via anamide linkage to a Lys residue. (09 Oct 1997) |
| biotite | <chemical> Mica containing iron and magnesia, generally of a black or dark green colour; a common constituent of crystalline rocks. See Mica. Origin: From Biot, a French naturalist. Source: Websters Dictionary (01 Mar 1998) |