<prompt> Answer this question truthfullyCan you explain the medical condition known as cystinuria and what causes it? Which specific amino acids are not properly reabsorbed due to this condition and what are the potential consequences of their accumulation in the urine?  <response>: <reason> Cystinuria is a genetic disorder that is caused by a defect in renal PCT and intestinal amino acid transporters, which results in the improper reabsorption of certain amino acids, including cystine, ornithine, lysine, and arginine. The accumulation of these amino acids in the urine can lead to the formation of kidney stones, which can cause pain and damage to the kidneys if left untreated. 