L-Cysteine (CAS # 52-90-4)
| Zizindikiro Zowopsa | Xn - Zowopsa |
| Zizindikiro Zowopsa | R22 - Zowopsa ngati zitamezedwa R36/37/38 - Zokwiyitsa maso, kupuma komanso khungu. |
| Kufotokozera Zachitetezo | S26 - Mukakhudza maso, yambani nthawi yomweyo ndi madzi ambiri ndikupempha uphungu wachipatala. S37/39 - Valani magolovesi oyenera komanso chitetezo chamaso / kumaso |
Mawu Oyamba
L-cysteine (L-Cysteine) ndi amino acid osafunikira, osungidwa ndi ma codon UGU ndi UGC, ndipo ndi sulfhydryl-containing amino acid. Chifukwa cha kukhalapo kwa magulu a sulfhydryl, kawopsedwe kake ndi kakang'ono, ndipo ngati antioxidant, amatha kuletsa kubadwa kwa ma radicals aulere. & & L-cysteine ndizochitika mwachilengedwe zosafunikira amino acid. Iye ndi woyambitsa NMDA. Imagwiranso ntchito zambiri mu chikhalidwe cha maselo, motere: 1. Mapuloteni kaphatikizidwe gawo lapansi; Gulu la sulfhydryl mu cysteine limagwira ntchito yofunika kwambiri popanga zomangira za disulfide, komanso limayang'anira kupindika kwa mapuloteni, kupanga mapangidwe achiwiri ndi apamwamba. 2. Kaphatikizidwe ka Acetyl-CoA; 3. kuteteza maselo ku kupsyinjika kwa okosijeni; 4. ndiye gwero lalikulu la sulfure mu chikhalidwe cha maselo; 5. Metal ionophore. & & Zochita Zachilengedwe: Cysteine ndi polar α-amino acid yokhala ndi magulu a sulfhydryl mu gulu la aliphatic. Cysteine ndi amino acid ofunikira komanso saccharogenic amino acid kwa thupi la munthu. Itha kusinthidwa kuchokera ku methionine (methionine, amino acid yofunika kwambiri m'thupi la munthu) ndipo imatha kusinthidwa kukhala cystine. Kuwonongeka kwa cysteine kuwonongeka kukhala pyruvate, hydrogen sulfide ndi ammonia kudzera mu zochita za desulphurase pansi pa anaerobic mikhalidwe, kapena kupyolera mu transamination, mankhwala apakatikati a β-mercaptopyruvate amawonongeka kukhala pyruvate ndi sulfure. Pansi pa makutidwe ndi okosijeni, itatha kukhala oxidized kukhala cysteine sulfurous acid, imatha kuwola kukhala pyruvate ndi sulfurous acid ndi transamination, ndikuwola kukhala taurine ndi taurine ndi decarboxylation. Kuphatikiza apo, cysteine ndi gulu losakhazikika, losavuta redox, ndipo limasinthasintha ndi cystine. Itha kupangidwanso ndi mankhwala onunkhira owopsa kuti apange mercapturic acid kuti achotse poizoni. Cysteine ndi mankhwala ochepetsera, omwe amatha kulimbikitsa mapangidwe a gluten, kuchepetsa nthawi yofunikira kusakaniza ndi mphamvu zofunikira pakugwiritsa ntchito mankhwala. Cysteine amafooketsa kapangidwe ka puloteni posintha zomangira za disulfide pakati pa mamolekyu a mapuloteni ndi mkati mwa mamolekyu a mapuloteni, kotero kuti mapuloteniwo atambasulidwe.
