Abstract
Single human red blood cells, in which the hemoglobin (Hb) molecules exist in their native, tetrameric states, were analyzed. Upon injection and lysis of a cell, the tetramers were dissociated on-column into their respective polypeptide chains, separated, and detected by laser-induced native fluorescence detection with 275-nm excitation. This technique was applied to the determination of hemoglobin variants as found in adult (normal and elevated Hb A 1) and fetal erythrocytes. Normal adult cells contained 9.6% and 4.8% glycated β- and α-chains, respectively.] Cells with elevated Hb A 1 gave 30% and 12%, respectively. The amounts of glycated Hb and total Hb in a given cell were found to be uncorrelated.
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