MedGen

Hyperdibasic aminoaciduria, type 1 is characterized by increased renal clearance of lysine, ornithine and arginine, in the presence of normal concentrations of cystine. Heterozygous individuals are asymptomatic but homozygotes display intellectual deficit. To date, 25 heterozygotes and one homozygote have been reported. [from MONDO]

An increased level of a dibasic amino acid in the urine. Dibasic amino acids are usually refered to simply as basic aminoacids because they contain basic side chains at neutral pH. These are arginine (Arg), lysine (Lys), and histidine (His). [from HPO]