Cystine is an non-essential amino acids formed by a pair of cysteine oxidation,  Cystine is found most in protein.

Nutritional Phytochemical Analytical Laboratory

Molecular Weight: 240.30

Molecular Formula:  C₆H₁₂N₂O₄S₂

IUPAC Name: [R-(R*,R*)]-3,3¢-dithiobis[2-aminopropanoic acid]

CAS Name: L-Cystine

CAS number:  56-89-3

One Letter Code: 

Three Letter Code:

Cystine

Structural Formula

3D Structural Formula