Disorders of tryptophan syndrome

Congenital disorders of tryptophan metabolism

 * essential AA, including for the production of nicotinic acid and serotonin.

Hartnup's disease

 * AR hereditary.
 * the basis is the abnormal resorption of neutral AMK in the intestine and in the kidneys.
 * usually does not cause any clinical symptoms.
 * or skin photosensitivity is in the foreground.