L-Cysteine (CAS# 52-90-4)
| Hazard Symbols | Xn – Zvinokuvadza |
| Risk Codes | R22 – Zvinokuvadza kana ikamedzwa R36/37/38 - Kushungurudza maziso, kufema system uye ganda. |
| Tsanangudzo Yekuchengetedza | S26 – Kana wasangana nemaziso, sukurudza nekukurumidza nemvura yakawanda uye tsvaga mazano ekurapwa. S37/39 - Pfeka magirovhosi akakodzera uye dziviriro yeziso / kumeso |
Nhanganyaya
L-cysteine (L-Cysteine) isiri-yakakosha amino acid, yakavharidzirwa necodons UGU uye UGC, uye iri sulfhydryl-ine amino acid. Nekuda kwekuvapo kwemapoka e sulfhydryl, huturu hwayo hudiki, uye se antioxidant, inogona kudzivirira chizvarwa chemahara radicals. & & L-cysteine inowanzoitika isingakoshi amino acid. Ndiye activator yeNMDA. Inoitawo mabasa akawanda mumutauro wemasero, sezvinotevera: 1. Protein synthesis substrate; Iro sulfhydryl boka mu cysteine rinoita basa rakakosha mukuumbwa kwe disulfide bond, uye rinoitawo kupetwa kwemapuroteni, chizvarwa chechipiri uye chepamusoro zvimiro. 2. Acetyl-CoA synthesis; 3. chengetedza masero kubva kune oxidative kusagadzikana; 4. ndiyo tsime guru resarufa muchitokisi tsika; 5. Metal ionophore. & & Biological chiitiko: Cysteine i polar α-amino acid ine sulfhydryl mapoka mualiphatic boka. Cysteine ine mamiriro akakosha amino acid uye saccharogenic amino acid kumuviri wemunhu. Inogona kushandurwa kubva ku methionine (methionine, yakakosha amino acid yemuviri wemunhu) uye inogona kushandurwa kuita cystine. Kuparara kwe cysteine kunosvibiswa kuva pyruvate, hydrogen sulfide uye ammonia kuburikidza nekuita kwe desulphurase pasi peanaerobic mamiriro, kana kuburikidza nekushandura, chigadzirwa chepakati β-mercaptopyruvate chakasvibiswa kuva pyruvate uye sulfur. Pasi pemamiriro eoxidation, mushure mekuve oxidized ku cysteine sulfurous acid, inogona kuoreswa kuita pyruvate uye sulfurous asidhi ne transamination, uye yakaora kuita taurine uye taurine ne decarboxylation. Mukuwedzera, cysteine inhengo isina kugadzikana, nyore redox, uye inopindirana ne cystine. Inogona zvakare kudzorwa neane muchetura anonhuwirira makomisheni kugadzira mercapturic acid kuti ibvise huturu. Cysteine inhengo inoderedza, iyo inogona kukurudzira kuumbwa kwe gluten, kuderedza nguva inodiwa pakusanganiswa uye simba rinodiwa pakushandiswa kwemishonga. Cysteine inoderedza chimiro cheprotein nekushandura disulfide bond pakati peprotein molecules uye mukati meprotein molecules, kuitira kuti protein itambanuke.
