title: [Hemoglobin H: laboratory identification].
abstract: Hemoglobin H (Hb H) disease is an alpha thalassemia form characterized by low synthesis of alpha chain and high beta chain concentration; this unbalance induces the beta chain tetramers formation. Hb H is relatively frequent in Thailand and Greece. Isolated cases have been reported in Chinese, Filipinos, Malaysians. In the Near East occasional cases were observed in Greek Cypriots and Jordanian Arabs. Hb H carriers were found in Italy, Spain, Canada, Indonesia and other countries. In Brazil there are descendants of Italians, Chinese and people of negro origin who are carriers of Hb H. We identified the Hb H by electrophoresis, instability and characteristic inclusion bodies.
authors.affiliation: Setor de Hemoglobinopatias (LIM/1), Hospital das clínicas, Faculdade de Medicina, Universidade de São Paulo.
authors.forename: V S
authors.initials: VS
authors.lastname: Ribeiro
authors.forename: J T
authors.initials: JT
authors.lastname: de Araújo
mesh_terms: D000328:Adult; D004588:Electrophoresis, Cellulose Acetate; D006447:Hemoglobin H / Q000032:analysis*; D006801:Humans; D008297:Male; D013997:Time Factors; D017085:alpha-Thalassemia / Q000175:diagnosis*
chemical_list: D006447:Hemoglobin H
vernacular_title: Hemoglobina H: identificação laboratorial.