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I-L-Cysteine ​​(CAS# 52-90-4) Isithombe Esifakiwe
  • L-Cysteine ​​(CAS# 52-90-4) 1

I-L-Cysteine ​​(CAS# 52-90-4)

Isakhiwo Samakhemikhali:

I-Molecular Formula I-C3H7NO2S
I-Melting Point 220℃
I-Boling Point 293.9 °C ku-760 mmHg
Ukuzungezisa Okuthile(α) 8.75 º(C=12, 2N HCL)
Ukuncibilika kwamanzi 280 g/L (25℃)
Ukubukeka I-crystalline powder emhlophe
Isimo Sesitoreji 2-8℃
Kuyazwela Kuyazwela ekukhanyeni
I-MDL I-MFCD00064306
Izakhiwo Zomzimba Nezamakhemikhali I-Double Crystal monoclinic noma i-orthogonal crystal, iphoyinti elincibilikayo 178 ℃,[alpha] 26.5(mol/L hydrochloric acid), enokunambitheka kwe-imine, kusixazululo esingathathi hlangothi noma esine-alkaline kulula ukuba yi-oxidation yomoya ibe yi-cystine, indawo ene-asidi izinzile, inyibilika amanzi, i-ethanol, i-acetic acid, engancibiliki ku-ether, i-acetone, i-ethyl acetate, i-benzene, i-carbon disulfide ne-carbon tetrachloride.
Sebenzisa Ukwelashwa kwe-eczema, i-urticaria, ama-freckles nezinye izifo zesikhumba, uchungechunge lwayo lwemikhiqizo lusetshenziswa kabanzi embonini yezokwelapha, yokudla nezimonyo.

Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Izimpawu Eziyingozi I-Xn - Iyingozi
Amakhodi Engozi I-R22 – Iyingozi uma igwinywe
R36/37/38 – Ukucasula amehlo, uhlelo lokuphefumula kanye nesikhumba.
Incazelo Yokuphepha S26 – Uma uthintana namehlo, geza ngokushesha ngamanzi amaningi futhi ufune iseluleko sezokwelapha.
I-S37/39 – Gqoka amagilavu ​​afanelekile kanye nokuvikela iso/ubuso

 

Isingeniso

I-L-cysteine ​​(L-Cysteine) iyi-amino acid engabalulekile, efakwe ikhodi ngama-codon UGU ne-UGC, futhi iyi-amino acid equkethe i-sulfhydryl. Ngenxa yokuba khona kwamaqembu e-sulfhydryl, ubuthi bayo buncane, futhi njenge-antioxidant, bungavimbela ukukhiqizwa kwama-radicals mahhala. & & L-cysteine ​​​​iyi-amino acid eyenzeka ngokwemvelo engabalulekile. Ungumsunguli we-NMDA. Iphinde idlale izindima eziningi kusiko lamaseli, kanje: 1. I-protein synthesis substrate; Iqembu le-sulfhydryl ku-cysteine ​​​​lidlala indima ebalulekile ekwakhiweni kwezibopho ze-disulfide, futhi libhekele ukugoqa amaprotheni, ukukhiqizwa kwezakhiwo zesibili neziphakeme. 2. Ukuhlanganiswa kwe-Acetyl-CoA; 3. vikela amangqamuzana ekucindezelekeni okwenziwe nge-oxidative; 4. iwumthombo oyinhloko wesulfure kusiko lwamaseli; 5. Ionophore yensimbi. & & Umsebenzi we-Biological: I-Cysteine ​​iyi-polar α-amino acid equkethe amaqembu e-sulfhydryl eqenjini le-aliphatic. I-Cysteine ​​​​yi-amino acid ebalulekile enemibandela kanye ne-saccharogenic amino acid emzimbeni womuntu. Ingaguqulwa isuka ku-methionine (i-methionine, i-amino acid ebalulekile yomzimba womuntu) futhi ingaguqulwa ibe yi-cystine. Ukubola kwe-cysteine ​​​​kuchithwa ku-pyruvate, i-hydrogen sulfide ne-ammonia ngokusebenzisa isenzo se-desulphurase ngaphansi kwezimo ze-anaerobic, noma ngokusebenzisa i-transamination, umkhiqizo ophakathi nendawo i-β-mercaptopyruvate uchithwa ube yi-pyruvate nesibabule. Ngaphansi kwezimo ze-oxidation, ngemva kokufakwa i-oxidized ku-cysteine ​​sulfurous acid, ingabola ibe yi-pyruvate ne-sulfurous acid ngokushintshaniswa, futhi iboliswe ibe yi-taurine ne-taurine nge-decarboxylation. Ngaphezu kwalokho, i-cysteine ​​​​yinhlanganisela engazinzile, i-redox kalula, futhi ihlangana ne-cystine. Ingaphinda incishiswe ngezinhlanganisela ezinobuthi ezinobuthi ukuze kuhlanganiswe i-mercapturic acid ukuze ikhiphe ubuthi. I-Cysteine ​​​​i-agent yokunciphisa, engakhuthaza ukwakheka kwe-gluten, ukunciphisa isikhathi esidingekayo sokuxuba kanye namandla adingekayo ekusetshenzisweni komuthi. I-Cysteine ​​​​yenza buthaka ukwakheka kwephrotheni ngokushintsha izibopho ze-disulfide phakathi kwama-molecule amaprotheni nangaphakathi kwama-molecule amaprotheni, ukuze amaprotheni anwebe.

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