| tear stone | A concretion in the lacrimal apparatus. Synonym: lacrimal calculus, ophthalmolith, tear stone. Origin: dacryo-+ G. Lithos, stone (05 Mar 2000) |
|---|---|
| kidney stone | <nephrology, urology> The presence of calculi in the kidney or collecting system. The calculi are usually small (2-12mm) solid, crystalline, concretions that develop in the kidney and eventually pass through the genitourinary tract. Stones may be composed of calcium, phosphate or uric acid. (27 Sep 1997) |
| acetyl CoA-(beta-aminoethyl)-L-cysteine omega-N-acetyltransferase | <enzyme> Forms s-(beta-n-acetyl-aminoethyl)-l-cysteine Registry number: EC 2.3.1.- Synonym: acoac-acetyltransferase, acetyl coenzyme a-(beta-aminoethyl)-l-cysteine omega-n-acetyltransferase (26 Jun 1999) |
| Carica candamarencis glycosylated cysteine proteinase | <enzyme> A glycoprotein from mountain papaya with the carbohydrate moiety bound to asparagine at position 44; has high degree of identity with chymopapain; amino acid sequence has been determined Registry number: EC 3.4.22.- Synonym: cc-iii cysteine proteinase (26 Jun 1999) |
| glutamate-cysteine ligase | <enzyme> One of the enzymes active in the gamma-glutamyl cycle. It catalyses the synthesis of gamma-glutamylcysteine from glutamate and cysteine in the presence of ATP with the formation of ADP and orthophosphate. Chemical name: L-Glutamate:L-cysteine gamma-ligase (ADP-forming) Registry number: EC 6.3.2.2 (12 Dec 1998) |
| mercaptolactate-cysteine disulfiduria | Elevated levels of the mixed disulfide of 3-mercaptolactate and cysteine in the urine. (05 Mar 2000) |
| methyl cysteine hydrochloride | Mecysteine hydrochloride;the methyl ester of cysteine hydrochloride; a mucolytic agent. (05 Mar 2000) |
| cysteine | <amino acid> The only amino acid to contain a thiol (SH) group. In intracellular enzymes the unique reactivity of this group is frequently exploited at the catalytic site. In extracellular proteins found only as _ cystine in disulphide bridges or fatty acylated. (18 Nov 1997) |
| cysteine aminopeptidase | <enzyme> Catalyses cysteine-peptide to yield cysteine and peptide Registry number: EC 3.4.11.- (26 Jun 1999) |
| cysteine carboxypeptidase | <enzyme> An enzyme which removes the last peptide bond on a protein (the one at the carboxyl end). Its active site contains the sulphur part of the amino acid cysteine. (09 Oct 1997) |
| cysteine conjugate S-oxidase | <enzyme> Converts s-benzyl-l-cysteine to s-benzyl-l-cysteine sulfoxide; uses o2 and NADPH; may be a flavin-containing monooxygenase Registry number: EC 1.13.12- (26 Jun 1999) |
| cysteine conjugate transaminase | <enzyme> Generates thiopyruvates by deamination of cysteine conjugates leaving the r-s-c bond intact Registry number: EC 2.6.1.- Synonym: cysteine-conjugate alpha-ketoglutarate transaminase (26 Jun 1999) |
| cysteine desulfhydrase | <enzyme> A multifunctional pyridoxal phosphate enzyme. In the final step in the biosynthesis of cysteine it catalyses the cleavage of cystathionine to yield cysteine, ammonia, and 2-ketobutyrate. Chemical name: L-Cystathionine cysteine-lyase (deaminating) Registry number: EC 4.4.1.1 (12 Dec 1998) |
| cysteine desulfurase | <enzyme> Pyridoxal phosphate enzyme which catalyses the formation of l-alanine and elemental sulfur from cysteine; required for full activation of the metalloproteins of azotobacter vinelandii nitrogenase Registry number: EC 4.4.1.- Synonym: nifs gene product, azotobacter, nifs protein, azotobacter (26 Jun 1999) |
| cysteine proteinase | <enzyme> An enzyme that destroys proteins by hydrolysis, turning them back into individual amino acids. (09 Oct 1997) |