30089

L-cystéine

≥98.5% (RT), suitable for HPLC, BioUltra

• Synonyme(s) : Acide (R)-2-amino-3-mercaptopropionique
• Formule linéaire : HSCH₂CH(NH₂)CO₂H
• Numéro CAS: 52-90-4
• Poids moléculaire : 121.16
• Beilstein: 1721408
• Numéro CE : 200-158-2
• Numéro MDL: MFCD00064306
• Code UNSPSC : 12352209
• eCl@ss : 32160406
• ID de substance PubChem : 57648406
• Nomenclature NACRES : NA.26

Propriétés

• Nom du produit: L-cystéine, BioUltra, ≥98.5% (RT)
• Gamme de produits: BioUltra
• Niveau de qualité: 200
• Essai: ≥98.5% (RT)
• Forme: powder or crystals
• Activité optique: [α]20/D +8.0±0.5°, c = 5% in 5 M HCl
• Technique(s): HPLC: suitable
• Impuretés: insoluble matter, passes filter test; ≤0.5% foreign amino acids
• Résidus de calcination: ≤0.05% (as SO₄)
• Perte: ≤0.05% loss on drying, 20 °C (HV)
• Couleur: white
• Pf: 240 °C (dec.) (lit.)
• Solubilité: 1 M HCl: 1 M at 20 °C, clear, colorless
• Traces d'anions: chloride (Cl^-): ≤100 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• Traces de cations: Al: ≤5 mg/kg; As: ≤0.1 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤50 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; NH₄⁺: ≤500 mg/kg; Na: ≤100 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Sr: ≤5 mg/kg; Zn: ≤5 mg/kg
• λ: 1 M in 1 M HCl
• Absorption UV: λ: 260 nm A_max: 1.5; λ: 280 nm A_max: 0.2
• Chaîne SMILES: N[C@@H](CS)C(O)=O
• InChI: 1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1
• Clé InChI: XUJNEKJLAYXESH-REOHCLBHSA-N

Description

Application

L-Cysteine has been used in quenching of unreacted maleimide during antibody grafting. It has also been used in the preparation of nitrosocysteine stock solution, that has been employed to induce S-nitrosylation to achieve reversible cysteine modification.[1][2]

Actions biochimiques/physiologiques

Il s'agit d'un agoniste des récepteurs glutamatergiques de type NMDA.

Cysteine is one of the functional amino acids that regulates metabolism for growth, reproduction, maintenance and immunity. Cysteine provides the disulfide linkage in proteins. It is directly associated with the transport of sulfur. Taurine, a metabolic product of cysteine acts as an antioxidant and controls the cellular redox state. Cysteine is involved in the formation of hydrogen sulfide that is utilized as a signaling molecule.[3]

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: dust mask type N95 (US), Eyeshields, Gloves