Linked from
The 4 pages that link to Cystine, each with the reason it gives.
CysteineRelated: Cystine links cysteine’s oxidation chemistry to its transport and metabolism.
NephrolithiasisRelated: Inherited failure to reabsorb cystine can cause cystine stones.
CystinuriaBroader topic: Its limited solubility explains why urinary excess forms stones.
CystinosisRelated: This poorly soluble molecule accumulates in cells when lysosomal export fails.