Haemoglobin D Los Angeles, D-β+-Thalassaemia, and D-β°- Thalassaemia
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The first 2 Canadian cases of combinations of Hb D Los Angeles and beta-thalassaemia were found in an Italian family and an East Indian family in Hamilton, Ont. The structure of the Hb D variant was identified by radioimmunoassay. The beta +-thalassaemia trait in the Italian family and the beta o-thalassaemia trait in the East Indian family were confirmed by studies of globin chain synthesis. Previous cases of Hb D-beta-thalassaemia were summarized and family studies of the 2 new cases were presented.
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