| hep | <virology> A high egg passage virus is a weakened virus which is passed on through eggs. (09 Oct 1997) |
|---|---|
| hep tree | The wild dog-rose. See: Hep. Source: Websters Dictionary (01 Mar 1998) |
| hepadnaviridae | <virology> A family of DNA-containing viruses that infect cause hepatitis in a wide range ofvertebrate species. (09 Oct 1997) |
| hepadnaviridae infections | Virus diseases caused by the hepadnaviridae. (12 Dec 1998) |
| hepar | 1. <chemistry> Liver of sulphur; a substance of a liver-brown colour, sometimes used in medicine. It is formed by fusing sulphur with carbonates of the alkalies (especially. Potassium), and consists essentially of alkaline sulphides. Synonym: hepar sulphuris . 2. Any substance resembling hepar proper, in appearance; specifically, in homeopathy, calcium sulphide, called also hepar sulphuris calcareum . <chemistry> Hepar antimonii, a substance, of a liver-brown colour, obtained by fusing together antimony sulphide with alkaline sulphides, and consisting of sulphantimonites of the alkalies. Synonym: liver of antimony. Origin: L. Hepar, hepatis, the liver, Gr. Source: Websters Dictionary (01 Mar 1998) |
| heparan N-sulfatase | <enzyme> An enzyme that participates in the stepwise degradation of heparan sulfate; heparan N-sulfatase hydrolyzes the sulfate moiety attached to the amino group of the glucosamine residue of heparan sulfate; a deficiency of this enzyme is associated with mucopolysaccharidose IIIA (Sanfilippo's syndrome A). (05 Mar 2000) |
| heparan sulfate | <chemical> Heparitin, sulfate. A glycosaminoglycan occurring in the liver, aorta, and lung. It has a structure similar to heparin, but there are more n-acetyl groups and fewer o- and n-sulfate groups. It is an accumulation product in several mucopolysaccharidoses. Chemical name: Heparitin, sulfate (12 Dec 1998) |
| heparan sulfate D-glucosaminyl 3-O-sulfotransferase | <enzyme> Involved in biosynthesis of heparan sulfate proteoglycans Registry number: EC 2.8.2.- Synonym: hsg 3-o-sulfotransferase (26 Jun 1999) |
| heparan sulfate proteoglycan | Ubiquitous macromolecules associated with the cell surface and extracellular matrix of a wide range of cells of vertebrate and invertebrate tissues. They are essential cofactors in cell-matrix adhesion processes, in cell-cell recognition systems, and in receptor-growth factor interactions. (12 Dec 1998) |
| heparan sulfate sulfatase | <enzyme> Probable defect in sanfilippo a syndrome Registry number: EC 3.1.6.- Synonym: heparan sulphatase (26 Jun 1999) |
| heparan sulfate-N-deacetylase-N-sulfotransferase | <enzyme> Catalyses both the n-deacetylation and the n-sulfation reactions that begin modification of heparan sulfate's oligosaccharide backbone Registry number: EC 2.8.2.- Synonym: hs-ndac-nst (26 Jun 1999) |
| heparan sulphate | Constituent of membrane associated proteoglycans. The heparan sulphate binding domain of NCAM is proposed to augment NCAM NCAM interactions, suggesting that cell cell bonds mediated by NCAM may involve interactions between multiple ligands. The putative heparin binding site on NCAM is a 28 aa peptide shown to bind both heparin and retinal cells, as well as to inhibit retinal cell adhesion to NCAM. This strengthens the argument that that this site contributes directly to NCAM mediated cell cell adhesion. (18 Nov 1997) |
| heparan-sulfate 2-sulfotransferase | <enzyme> An o-sulfotransferase that catalyses transfer of sulfate from 3'-phosphoadenosine 5'-phosphosulfate to l-iduronic acid at position 2 of heparan sulfate; genbank d88811 Registry number: EC 2.8.2.- Synonym: hs2st enzyme (26 Jun 1999) |
| heparanase | <enzyme> Tumour cell enzyme has endoglycosidase activity which degrades glycosaminoglycans into fragments of intermediate size Registry number: EC 3.2.1.- (26 Jun 1999) |
| heparin | <drug> Sulphated mucopolysaccharide, found in granules of mast cells, that inhibits the action of thrombin on fibrinogen by potentiating antithrombins, thereby interfering with the blood clotting cascade. Platelet factor IV will neutralise heparin. (18 Nov 1997) |