Bartosz G, Tannert C, Fried R, Leyko W
Experientia. 1978 Nov 15;34(11):1464. doi: 10.1007/BF01932355.
Superoxide dismutase activity was determined by the adrenalin method in bovine erythrocytes separated according to age. Progressive loss of the enzyme activity was found, down to ca 65% of that of the youngest cells.