title: The HL-A leucocyte system in Down's syndrome.
mesh_terms: D000483:Alleles; D000918:Antibody Specificity; D002869:Chromosome Aberrations; D002904:Chromosomes, Human, 21-22 and Y; D003601:Cytotoxicity Tests, Immunologic; D004314:Down Syndrome / Q000235:genetics / Q000276:immunology*; D005787:Gene Frequency; D006648:Histocompatibility; D006801:Humans; D007106:Immune Sera; D007518:Isoantibodies; D007519:Isoantigens; D007962:Leukocytes / Q000276:immunology*; D008214:Lymphocytes / Q000276:immunology; D010641:Phenotype; D012730:Sex Chromosomes; D014314:Trisomy
chemical_list: D007106:Immune Sera; D007518:Isoantibodies; D007519:Isoantigens