| ammonium sulphate precipitation | <technique> In this technique, ammonium sulphate is used to make proteins precipitate out of a solution, the proteins are then collected by centrifugation. (09 Oct 1997) |
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| capsular precipitation reaction | Swelling of the capsule surrounding a bacterium as a result of interaction with anticapsular antibody, consequently the capsule becomes more refractile and conspicuous. (18 Nov 1997) |
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| precipitation | The act or process of precipitating. Origin: L. Praecipitatio (18 Nov 1997) |
| precipitation curve | A graph of the quantity of precipitate formed as a function of the quantity of antigen added during the titration of an antibody with an antigen. Synonym: Heidelberger curve. (05 Mar 2000) |
| precipitation test | An in vitro test in which antigen is in soluble form and precipitates when it combines with added specific antibody in the presence of an electrolyte. See: gel diffusion precipitin tests, ring precipitin test. Synonym: precipitation test. (05 Mar 2000) |
| hapten inhibition of precipitation | Inhibition of precipitation that occurs when the precipitin has combined with hapten of the same specificity as the subsequently added antigen. (05 Mar 2000) |
| double antibody precipitation | A method of separating antibody-bound antigen (e.g., insulin) from free antigen by precipitating the former with antibody specific for immunoglobulin. Synonym: double antibody immunoassay, double antibody method. (05 Mar 2000) |
| immune precipitation | <immunology> The precipitation of a multivalent antigen by a bivalent antibody, resulting in the formation of a large complex. The antibody and antigen must be soluble. Precipitation usually occurs when there is near equivalence between antibody and antigen concentrations. (18 Nov 1997) |
| isopropanol precipitation test | A test using the principle that the internal bonds of haemoglobin are weakened by nonpolar solvents; thus, unstable haemoglobins will precipitate more rapidly than other haemoglobins in isopropanol. (05 Mar 2000) |
| chondroitin sulphate | <biochemistry> Major components of the extracellular matrix and connective tissue of animals, found on the outside of the cell membranes of some animal cells. They are repeating polymers of glucuronic acid and sulphated N acetyl glucosamine residues that are highly hydrophilic and anionic. Found in association with proteins. (15 Jan 1998) |
| copper sulphate | CuSo4-5H2O;it is highly poisonous to algae, is a prompt and active emetic, and is used as an irritant, astringent, and fungicide. Synonym: copper sulfate, copper sulphate. (05 Mar 2000) |
| 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) |
| Proteoheparan sulphate | <protein> Obsolete term for hydrophobic Integral membrane proteins. (18 Nov 1997) |
| sodium dodecyl sulphate | See: SDS. (18 Nov 1997) |
| sulphate | <chemistry> A salt of sulphuric acid. Origin: NL. Sulphas, sulphatis, fr. L. Sulphur, sulfur, brimstone, sulphur: cf. F. Sulfate. Source: Websters Dictionary (01 Mar 1998) |
| sulphate-reducing bacterium | <microbiology> A prokaryote which is able to reduce sulphate SO4 (as a terminal electron acceptor) using electrons donated from organic acids, fatty acids, alcohols or hydrogen (electron donors). (19 Jan 1998) |