title: IgG2 deficiency in ataxia-telangiectasia.
mesh_terms: D000293:Adolescent; D001260:Ataxia Telangiectasia / Q000150:complications / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D004406:Dysgammaglobulinemia / Q000276:immunology*; D006801:Humans; D017098:IgA Deficiency; D017099:IgG Deficiency; D007074:Immunoglobulin G / Q000032:analysis / Q000145:classification; D007223:Infant; D007239:Infections / Q000453:epidemiology / Q000276:immunology
chemical_list: D007074:Immunoglobulin G