| hyaluronate lyase | <enzyme> Also acts on chondroitin; formerly EC 4.2.99.1 Registry number: EC 4.2.2.1 Synonym: mucinase, spreading factor (26 Jun 1999) |
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| hyaluronic acid | <biochemistry> Polymer composed of repeating dimeric units of glucuronic acid and N acetyl glucosamine. May be of extremely high molecular weight (up to several million daltons) and forms the core of complex proteoglycan aggregates found in extracellular matrix. (18 Nov 1997) |
| hyaluronic acid synthetase | <enzyme> Incorporation of glucuronic acid into hyaluronic acid from udp-glucuronic acid in the presence of udp-n-acetylglucosamine, EC 2.4.1.17 Registry number: EC 2.4.1.- Synonym: hyaluronate synthetase, hyaluronan synthetase, hyaluronate synthase (26 Jun 1999) |
| hyaluronic lyase | <enzyme> Also acts on chondroitin; formerly EC 4.2.99.1 Registry number: EC 4.2.2.1 Synonym: mucinase, spreading factor (26 Jun 1999) |
| hyaluronidase | <enzyme> Enzyme that degrades hyaluronic acid, found in lysosomes. (18 Nov 1997) |
| hyaluronoglucosaminidase | <enzyme> An enzyme that catalyses the random hydrolysis of 1,4-linkages between n-acetyl-beta-d-glucosamine and d-glucuronate residues in hyaluronate. Chemical name: Hyaluronate 4-glycanohydrolase Registry number: EC 3.2.1.35 (12 Dec 1998) |
| hyaluronoglucuronidase | <enzyme> An enzyme hydrolyzing b1,3 linkages in hyaluronates. See: hyaluronidase. (05 Mar 2000) |
| hybaroxia | Oxygen therapy with pressures greater than 1 atmosphere or ambient oxygen pressure applied to the entire body in a chamber or room. Origin: G. Hyper, above, + baros, pressure, + oxys, acute (05 Mar 2000) |
| hybenzate | USAN-approved contraction for o-(4-hydroxybenzoyl)benzoate. (05 Mar 2000) |
| hybodont | <paleontology> Of, pertaining to, or resembling, an extinct genus of sharks (Hybodus), especially in the form of the teeth, which consist of a principal median cone with smaller lateral ones. Origin: Gr. Hump +, a tooth. Source: Websters Dictionary (01 Mar 1998) |
| hybodus | <paleontology> An extinct genus of sharks having conical, compressed teeth. Origin: NL. See Hybodont. Source: Websters Dictionary (01 Mar 1998) |
| hybrid | <biology> An offspring of parents from different species or sub-species. (09 Oct 1997) |
| hybrid antibody | <immunology> Artificially produced antibody made by fusing hybridomas producing two different antibodies, the hybrid cells produce three different antibodies, only one of which is a heterophilic antibody. Can also be prepared chemically from two antibodies. (18 Nov 1997) |
| hybrid cell | <genetics, molecular biology> Any cell type containing components from one or more genomes, other than zygotes and their derivatives. Hybrid cells may be formed by cell fusion or by transfection. See: heterokaryon. (18 Nov 1997) |
| hybrid diode | <radiobiology> An ion diode that uses a field coil in series with the ion diode's accelerating gap to generate sufficient magnetic flux in the diode for electron control. The diode is a combination of the Applied-B diode's ion source and the Ampfion diode's field coil. (09 Oct 1997) |