Table 1.

The relative concentrations of ¹⁷O and ¹⁶O spin adducts of DMPO/^⋅OH formed during the reaction of SOD with 89% [¹⁷O]-H₂O₂

Conditions	% of DMPO/⋅OH spin adducts from H2O2	% of DMPO/⋅OH spin adducts from H2O
Fe(II)-EDTA	100	0
WT-SOD	63  ±  0.5	37  ±  0.5
A4V	64  ±  1.4	36  ±  1.4
G93A	62  ±  0.8	38  ±  0.8

Data were normalized with respect to the ¹⁷O content in H₂¹⁷O₂ by using the formula: %DMPO/^⋅OH from water = 100(%H₂¹⁷O₂ − %DMPO/^•17OH)/%H₂¹⁷O₂.