L-Cysteine（CAS # 52-90-4)
| Nga Tohu Whakamate | Xn – He kino |
| Waehere Morearea | R22 – He kino ki te horomia R36/37/38 – He whakapataritari ki nga kanohi, te punaha manawa me te kiri. |
| Whakaahuatanga Haumaru | S26 – Mena ka pa ki nga kanohi, horoi tonu ki te nui o te wai me te rapu tohutohu hauora. S37/39 – Kia mau nga karapu tika me te whakamarumaru kanohi/kanohi |
Kupu Whakataki
Ko te L-cysteine (L-Cysteine) he waikawa amino kore-tino, kua whakawaeheretia e nga codons UGU me UGC, a he waikawa amino-sulfhydryl kei roto. Na te ahua o nga roopu sulfhydryl, he iti te paitini, a hei antioxidant, ka taea te aukati i te whakatipuranga o nga rauropi kore utu. & & Ko te L-cysteine he waikawa amino kore-tino. He kaiwhakahohe ia mo te NMDA. He maha hoki nga mahi i roto i te ahurea o te pūtau, e whai ake nei: 1. Tïpako whakahiato pūmua; Ko te roopu sulfhydryl i roto i te cysteine he mahi nui ki te hanga i nga here disulfide, a ko te kawenga hoki mo te kopaki o nga pūmua, te whakatipuranga o nga hanganga tuarua me te tuatoru. 2. Te whakahiato acetyl-CoA; 3. tiaki pūtau i te ahotea hāora; 4. Ko te puna matua o te whanariki i roto i te ahurea pūtau; 5. Ionopora whakarewa. & & Mahinga Koiora: Ko te Cysteine he waikawa α-amino polar kei roto nga roopu sulfhydryl kei te roopu aliphatic. Ko te Cysteine he waikawa amino tuuturu me te waikawa amino saccharogenic mo te tinana o te tangata. Ka taea te huri mai i te methionine (methionine, he waikawa amino nui mo te tinana o te tangata) ka taea te huri hei cystine. Ko te pirau o te cysteine ka pakaruhia ki te pyruvate, hydrogen sulfide me te haukini na roto i te mahi a te desulphurase i raro i nga tikanga anaerobic, ma te whakawhiti ranei, ka pakaruhia te hua takawaenga β-mercaptopyruvate ki te pyruvate me te whanariki. I raro i nga tikanga o te oxidation, i muri i te oxidized ki te cysteine sulfurous acid, ka taea te pirau ki te pyruvate me te waikawa sulfurous na roto i te whakawhitinga, ka pakaru ki te taurine me te taurine ma te decarboxylation. I tua atu, ko te cysteine he puhui pahekeheke, he ngawari ki te redox, ka whakawhiti ki te cystine. Ka taea hoki te whakakoi ki nga puhui kakara paitini hei whakahiato i te waikawa mercapturic hei whakakore. Ko te Cysteine he kaihoko whakaheke, ka taea te whakatairanga i te hanganga o te gluten, te whakaiti i te wa e hiahiatia ana mo te whakauru me te kaha e hiahiatia ana mo te whakamahinga rongoa. Ka ngoikore te Cysteine i te hanga o te pūmua ma te huri i nga here disulfide i waenga i nga ngota ngota pūmua me roto i nga ngota ngota pūmua, kia toro atu ai te pūmua.
