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  • Title: Hemoglobin Okayama [beta 2 (NA 2) His replaced by Gln]: a new 'silent' hemoglobin variant with substituted amino acid residue at the 2,3-diphosphoglycerate binding site.
    Author: Harano T, Harano K, Shibata S, Ueda S, Mori H, Arimasa N.
    Journal: FEBS Lett; 1983 May 30; 156(1):20-2. PubMed ID: 6852251.
    Abstract:
    A new 'silent' abnormal hemoglobin, Hb Okayama [beta 2 (NA 2) His replaced by Gln], happened to be discovered in a diabetic Japanese female living in Okayama Prefecture, Japan, in the course of glyco-Hb measurement of the blood samples of diabetic patients. This variant did not differ from Hb A by conventional electrophoretic tests. Only the isoelectric focusing on PAG plate for the determination of glyco-Hb and the cation exchanger chromatography were successful in the separation of this abnormal variant from Hb A and glyco-Hb. Functional study of the whole blood demonstrated a slight increase of oxygen affinity.
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