CTNS is the gene that encodes the proteincystinosin in humans. Cystinosin is a lysosomal seven-transmembrane protein that functions as an active transporter for the export of cystine molecules out of the lysosome.[5]
^Town M, Jean G, Cherqui S, Attard M, Forestier L, Whitmore SA, et al. (April 1998). "A novel gene encoding an integral membrane protein is mutated in nephropathic cystinosis". Nature Genetics. 18 (4): 319–324. doi:10.1038/ng0498-319. PMID9537412. S2CID10629789.