Abstract
The effect of osmotically induced alterations in mean corpuscular hemoglobin concentration (MCHC) on oxygen affinity of hemoglobin was studied in blood cells containing various concentrations of 2,3-diphosphoglycerate (DPG). At normal DPG concentration (0.88 mol/mol Hb) there was a positive correlation between MCHC and whole blood oxygen affinity (P50); the magnitude of the effect, expressed as δP50/δMCHC, was 0.17, a value considerably smaller than that reported by previous investigators. At low DPG concentration ( 1.3 mol/mol Hb) no relationship between MCHC and P50 was found. The results are discussed in relation to the various changes in the intracellular milieu on osmotic manipulation, and it is concluded that the alterations of P50 are due mainly to changes in intracellular ionic strength.
Published Version
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