| proteaceous | <botany> Of or pertaining to the Proteaceae, an order of apetalous evergreen shrubs, mostly natives of the Cape of Good Hope or of Australia. Origin: From Proteus. Source: Websters Dictionary (01 Mar 1998) |
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| protean | Changeable in form; having the power to change body form, like the amoeba. Origin: G. Proteus, a god having the power to change his form (05 Mar 2000) |
| protease | <enzyme> A proteinase which is any enzyme that catalyses the splitting of interior peptide bonds in a protein. (18 Nov 1997) |
| protease inhibitor | A drug that binds to and blocks HIV protease from working, thus preventing the production of new infectious viral articles. (09 Oct 1997) |
| protease inhibitors | Compounds which inhibit or antagonise biosynthesis or actions of proteases. (12 Dec 1998) |
| protease nexin | <protein> Specific inhibitor of urokinase, thrombin and plasmin. Reported to influence neurite outgrowth by regulating the degree of proteolytic activity and thereby preventing excess degradation of substrate macromolecules and promoting neurite adhesion. (18 Nov 1997) |
| proteases | Enzymes that degrade protein molecules. (14 Nov 1997) |
| proteasome | <cell biology> Proteolytic complexes that degrade cytosolic and nuclear proteins. Implicated in ATP dependent ubiquitin protein complex degradation and in antigen processing in antigen presenting cells. The 20S proteasome (700 kD), essential in ATP ubiquitin degradation pathway, has 13-15 subunits each of which has three or four different peptidase activities. 26S proteasomes may be formed in an ATP dependent fashion from a 20S proteasome and additional components, CF1 (660 kD), CF2 (250 kD) and CF3 (600 kD). Origin: Gr. Soma = body (18 Nov 1997) |