title: Low dopamine-beta-hydroxylase activity in Down's syndrome.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004298:Dopamine; D004299:Dopamine beta-Hydroxylase / Q000097:blood; D004314:Down Syndrome / Q000201:enzymology*; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000201:enzymology; D006899:Mixed Function Oxygenases / Q000097:blood*
chemical_list: D006899:Mixed Function Oxygenases; D004299:Dopamine beta-Hydroxylase; D004298:Dopamine