L-Cysteine （CAS # 52-90-4)
| Ibimenyetso bya Hazard | Xn - Byangiza |
| Kode y'ingaruka | R22 - Byangiza niba byamizwe R36 / 37/38 - Kurakaza amaso, sisitemu y'ubuhumekero n'uruhu. |
| Ibisobanuro byumutekano | S26 - Mugihe uhuye namaso, kwoza ako kanya n'amazi menshi hanyuma ushakishe inama mubuvuzi. S37 / 39 - Kwambara uturindantoki dukwiye no kurinda amaso / kurinda amaso |
Intangiriro
L-cysteine (L-Cysteine) ni aside amine idakenewe, igizwe na codons UGU na UGC, kandi ni sulfhydryl irimo aside amine. Bitewe no kuba hari amatsinda ya sulfhydryl, uburozi bwayo ni buto, kandi nka antioxydeant, burashobora gukumira ibisekuruza byubusa. & & L-cysteine nibisanzwe bibaho aside-aminide acide. Ni umurwanashyaka wa NMDA. Ifite kandi uruhare runini mu muco w'akagari, ku buryo bukurikira: 1. Protein synthesis substrate; Itsinda rya sulfhydryl muri sisitemu rifite uruhare runini mugushinga imiyoboro ya disulfide, kandi ishinzwe no kugwiza poroteyine, kubyara ibyiciro bya kabiri na kaminuza. 2. Synthesis ya Acetyl-CoA; 3. Kurinda selile guhagarika umutima; 4. Nisoko nyamukuru ya sulfure mumico y'akagari; 5. Iionofore. & & Igikorwa cyibinyabuzima: Cysteine ni polar α-amino aside irimo amatsinda ya sulfhydryl mumatsinda ya alifatique. Cysteine ni aside yingenzi ya aside amine na acide ya amine acide ya umubiri wa muntu. Irashobora guhinduka kuva methionine (methionine, aside amine yingenzi kumubiri wumuntu) kandi irashobora guhinduka muri sisitemu. Kwangirika kwa sisitemu ibora muri pyruvate, hydrogène sulfide na ammonia binyuze mu gikorwa cya desulphurase mu bihe bya anaerobic, cyangwa binyuze mu kwanduza, ibicuruzwa hagati β-mercaptopyruvate byangirika muri pyruvate na sulfure. Mugihe cya okiside, nyuma yo kuba okiside kuri acide ya sisitemu ya sulfure, irashobora kubora muri acide pyruvate na sulfure ikoresheje kwanduza, hanyuma ikabora muri taurine na taurine na decarboxylation. Mubyongeyeho, cysteine nikintu kidahindagurika, redox byoroshye, kandi ihuza na cystine. Irashobora kandi guhurizwa hamwe nuburozi bwa aromatic kugirango ihuze aside mercapturic kugirango yanduze. Cysteine nigikoresho kigabanya, gishobora guteza imbere gluten, kugabanya igihe gikenewe cyo kuvanga nimbaraga zikenewe mugukoresha imiti. Cysteine igabanya imiterere ya poroteyine ihindura imiyoboro ya disulfide hagati ya molekile ya poroteyine ndetse no muri molekile ya poroteyine, ku buryo poroteyine irambura.
