Imanishi H, Nakai T, Abe T, Takino T
Mech Ageing Dev. 1985 Oct 14;32(1):57-62. doi: 10.1016/0047-6374(85)90035-1.
Normal human red cells were centrifugally separated according to age by discontinuous density gradient of Percoll. Reduced glutathione (GSH), GSH stability and glucose-6-phosphate dehydrogenase (G6PD) activity in fractionated red cells decreased with age, while oxidized glutathione (GSSG) and methemoglobin (MetHb) increased with age.