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 .
C0242194
band 3 protein
C0014792
red cell