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    Hemoglobin. 1979;3(2-3):161-74.

    Hemoglobin Suan-Dok (alpha 2 109 (G16) Leu replaced by Arg beta 2): an unstable variant associated with alpha-thalassemia.

    Sanguansermsri T, Matragoon S, Changloah L, Flatz G.

    Abstract

    An abnormal hemoglobin variant was detected in a seven-year old Thai girl. The clinical and hematological pictures were indistinguishable from hemoglobin H disease. Upon cellulose acetate electrophoresis at pH 8.5 an abnormal hemoglobin variant was found together with hemoglobins A and H. The variant moved slightly behind HbF and amounted to approximately 9%. Globin chain synthesis studies of peripheral blood reticulocytes incubated with tritiated leucine revealed that the total radioactivity ratio alpha-chain + variant alpha-chain/beta-chain was 0.59, while the ratio variant alpha-chain/beta-chain was 0.12. The variant hemoglobin was somewhat unstable under heat denaturation and in the isopropanol test. Structural studies by component isolation, globin chain separation, peptide mapping and aminoacid analysis of abnormal peptides showed that the leucine residue 109 of the alpha-chain was replaced by arginine. This hemoglobin mutant has not been described before and is named Hemoglobin Suan-Dok.

    PMID:
    478977
    [PubMed - indexed for MEDLINE]

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