胱氨酸; 雙硫丙氨酸
Cystine \Cyst"ine\ (s?s"t?n; 104), n. [See {Cyst}.] (Physiol. Chem.) A white crystalline substance, {C3H7NSO2}, containing sulphur, occuring as a constituent of certain rare urinary calculi, and occasionally found as a sediment in urine.
cystine n : a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones