title: Analysis of serum amino acid levels by the twin study method and comparison with family studies.
mesh_terms: D000293:Adolescent; D000328:Adult; D000596:Amino Acids / Q000097:blood*; D002648:Child; D003553:Cystine / Q000097:blood; D005190:Family; D005260:Female; D005823:Genetics; D006801:Humans; D008239:Lysine / Q000097:blood; D008297:Male; D008715:Methionine / Q000097:blood; D008967:Molecular Biology; D009952:Ornithine / Q000097:blood; D011247:Pregnancy; D011392:Proline / Q000097:blood; D012107:Research Design; D012737:Sex Factors; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic
chemical_list: D000596:Amino Acids; D003553:Cystine; D011392:Proline; D008715:Methionine; D009952:Ornithine; D008239:Lysine