Abstract
Although Hb-C may be separated from Hb A2 by some ion exchange methods, most will not separate Hb E and Hb A2. The delta chain can be readily separated from the beta C, beta E and beta O-Arab chains by reverse phase HPLC. Hence, reverse phase HPLC provides a means of quantitatively determining Hb A2 in the presence of Hb C, Hb E, and Hb O-Arab. The procedure, although not highly accurate, does permit the detection of increased Hb A2, for example, in beta-thal heterozygotes and, therefore, is applicable to other conditions (Hb C, Hb E, Hb O-Arab).
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