The chemical substance with the name (H-Cys-NH2)2 · 2 HCl, commonly referred to as cystine dihydrochloride, is a derivative of the amino acid cysteine, which contains a disulfide bond between two cysteine molecules. This compound is characterized by its two cysteine residues linked by a covalent disulfide bond, contributing to its stability and structural integrity in biological systems. The presence of two hydrochloride (HCl) molecules indicates that the compound is in a salt form, enhancing its solubility in aqueous solutions. Cystine plays a crucial role in protein structure and function, particularly in the stabilization of protein folding through disulfide linkages. It is also involved in various biochemical processes, including antioxidant defense and the synthesis of other biomolecules. The compound is typically white to off-white in appearance and is soluble in water, making it useful in various biochemical and pharmaceutical applications. Its CAS number, 22671-21-2, is a unique identifier that facilitates its identification in chemical databases and regulatory contexts.

(H-Cys-NH2)2 . 2 HCl (Disulfide bond)

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CAS 22671-21-2: (H-Cys-NH2)2 . 2 HCl (Disulfide bond)

L-Cystine bis-amide dihydrochloride

Ref: 3D-FC49400

(2R,2'R)-3,3'-Disulfanediylbis(2-aminopropanamide) dihydrochloride

Ref: IN-DA00BDRO