Aging of the erythrocyte. 23. Changes in the permeation of spin‐labeled electrolytes

Abstract
The transport of spin‐labeled anions and cations was studied in bovine erythrocyte fractions of various ages. Permeation of a spin‐labeled anion, 3‐carboxy‐2,2,5,5‐tetramethylpyrrolidine‐1‐oxyl into the cells was found to be significantly slower in older cells, suggesting a functional impairment of the band 3 protein of the erythrocyte membrane during red cell aging in vivo.