L-Cysteine (CAS# 52-90-4)
| Matšoao a Kotsi | Xn - E Kotsi |
| Likhoutu tsa Kotsi | R22 – E kotsi ha e kwetswe R36/37/38 – Ho tena mahlo, tsamaiso ya ho hema le letlalo. |
| Tlhaloso ea Tšireletseho | S26 - Ha u kopana le mahlo, hlatsoa hang-hang ka metsi a mangata 'me u batle keletso ea bongaka. S37/39 - Apara liatlana tse loketseng le tšireletso ea mahlo / sefahleho |
Selelekela
L-cysteine (L-Cysteine) ke amino acid e seng ea bohlokoa, e kentsoeng ke li-codon UGU le UGC, 'me ke amino acid e nang le sulfhydryl. Ka lebaka la boteng ba lihlopha tsa sulfhydryl, chefo ea eona e nyenyane, 'me e le antioxidant, e ka thibela ho hlahisa li-radicals tsa mahala. & & L-cysteine ke amino acid e etsahalang ka tlhaho e seng ea bohlokoa. Ke mohlohlelletsi oa NMDA. E boetse e phetha likarolo tse ngata moetlong oa lisele, ka tsela e latelang: 1. Protein synthesis substrate; Sehlopha sa sulfhydryl ho cysteine se bapala karolo ea bohlokoa ho thehoeng ha litlamo tsa disulfide, hape se ikarabella bakeng sa ho mena ha liprotheine, ho hlahisa likarolo tsa bobeli le tsa thuto e phahameng. 2. Acetyl-CoA synthesis; 3. sireletsa lisele ho tloha khatello ea oxidative; 4. ke mohloli o ka sehloohong oa sebabole setso sa lisele; 5. Metal ionophore. & & Ts'ebetso ea Biological: Cysteine ke polar α-amino acid e nang le lihlopha tsa sulfhydryl sehlopheng sa aliphatic. Cysteine ke amino acid ea bohlokoa ea maemo le saccharogenic amino acid bakeng sa 'mele oa motho. E ka fetoloa ho tloha methionine (methionine, amino acid ea bohlokoa bakeng sa 'mele oa motho)' me e ka fetoloa cystine. Ho bola ha cysteine e senyehile ka pyruvate, hydrogen sulfide le ammonia ka ketso ea desulphurase tlas'a maemo a anaerobic, kapa ka transamination, sehlahisoa sa mahareng β-mercaptopyruvate se senngoa ho ba pyruvate le sebabole. Tlas'a maemo a oxidation, kamora hore e be oxidized ho cysteine sulfurous acid, e ka aroloa ho ba pyruvate le sulfurous acid ka transamination, 'me ea bola ho ba taurine le taurine ka decarboxylation. Ho phaella moo, cysteine ke motsoako o sa tsitsang, habonolo redox, 'me o fetoha le cystine. E ka boela ea koaheloa ka metsoako e chefo e nkhang hamonate ho kopanya mercapturic acid ho tlosa chefo. Cysteine ke ntho e fokotsang, e ka khothalletsang ho thehoa ha gluten, ho fokotsa nako e hlokahalang bakeng sa ho kopanya le matla a hlokahalang bakeng sa tšebeliso ea meriana. Cysteine e fokolisa sebopeho sa protheine ka ho fetola maqhama a disulfide pakeng tsa limolek'hule tsa protheine le ka hare ho limolek'hule tsa protheine, e le hore protheine e otlolle.
