title: Catabolism of serotonin in Down's syndrome (tisomy 21).
mesh_terms: D001792:Blood Platelets / Q000378:metabolism*; D002250:Carbon Radioisotopes; D002648:Child; D004314:Down Syndrome / Q000097:blood / Q000378:metabolism* / Q000652:urine; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine; D008995:Monoamine Oxidase / Q000502:physiology; D012701:Serotonin / Q000097:blood / Q000378:metabolism*
chemical_list: D002250:Carbon Radioisotopes; D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D008995:Monoamine Oxidase