11. By about age two, cystine crystals may also be present in the cornea. 12. IAANS can be attached to proteins via naturally occuring or engineered amino acid Cystine . 13. This conformation is called a cystine knot . 14. These combined features have been termed the cyclic cystine knot ( CCK ) motif. 15. The tumor suppressor p53 can initiate ferroptosis by preventing the import of extracellular cystine . 16. Cystine calculi are only faintly radiodense, while uric acid stones are usually entirely radiolucent.17. Cystinosis is usually treated with cysteamine, which is prescribed to decrease intralysosomal cystine accumulation. 18. Mixed disulfides occur in the folding and stabilization of proteins via cystine -cystine interactions. 19. Mixed disulfides occur in the folding and stabilization of proteins via cystine-cystine interactions. 20. Cystinosis is a lysosomal storage disease characterized by the abnormal accumulation of the amino acid cystine .
