L-Cysteine ​​​​(CAS# 52-90-4)

Okwu mmalite

L-cysteine ​​​​(L-Cysteine) bụ amino acid na-adịghị mkpa, nke codons UGU na UGC debere ya, yana amino acid nwere sulfhydryl. N'ihi ọnụnọ nke otu sulfhydryl, nsị ya dị ntakịrị, yana dịka antioxidant, ọ nwere ike igbochi ọgbọ nke free radicals. & & L-cysteine ​​​​bụ amino acid na-adịghị mkpa nke na-emekarị. Ọ bụ onye ọrụ NMDA. Ọ na-arụkwa ọtụtụ ọrụ na omenala cell, dị ka ndị a: 1. Protein synthesis substrate; Otu sulfhydryl dị na cysteine ​​na-arụ ọrụ dị mkpa n'ịmepụta agbụ nke disulfide, ọ bụkwa ya na-ahụ maka mpịachi nke protein, ọgbọ nke ụlọ abụọ na nke atọ. 2. Njikọ Acetyl-CoA; 3. chebe mkpụrụ ndụ site na nrụgide oxidative; 4. bụ isi iyi nke sọlfọ na omenala cell; 5. Metal ionophore. & & Ọrụ ndu: Cysteine ​​​​bụ polar α-amino acid nwere otu sulfhydryl n'ime otu aliphatic. Cysteine ​​​​bụ ihe dị mkpa amino acid na saccharogenic amino acid maka ahụ mmadụ. Enwere ike gbanwee ya site na methionine (methionine, amino acid dị mkpa maka ahụ mmadụ) ma nwee ike gbanwee ya na cystine. A na-emebi ire ere nke cysteine ​​n'ime pyruvate, hydrogen sulfide na amonia site na omume nke desulphurase n'okpuru ọnọdụ anaerobic, ma ọ bụ site na transamination, ngwaahịa etiti β-mercaptopyruvate na-aghọ pyruvate na sọlfọ. N'okpuru ọnọdụ oxidation, mgbe a na-agbanye ya na cysteine ​​sulfurous acid, ọ nwere ike imebi ya n'ime pyruvate na sulfurous acid site na transamination, wee ghọọ taurine na taurine site na decarboxylation. Tụkwasị na nke ahụ, cysteine ​​bụ ihe na-adịghị akwụsi ike, dị mfe redox, na interconverts na cystine. A pụkwara iji ogige aromatic na-egbu egbu mechie ya iji mejupụta acid mercapturic iji mebie ya. Cysteine ​​​​bụ onye na-ebelata ihe, nke nwere ike ịkwalite mmepụta nke gluten, belata oge achọrọ maka ịgwakọta na ike achọrọ maka iji ọgwụ eme ihe. Cysteine ​​​​na-ebelata nhazi nke protein site n'ịgbanwe njikọ disulfide n'etiti ụmụ irighiri protein na n'ime ụmụ irighiri protein, nke mere na protein ahụ gbatịa.