Fig. 5

a Superoxide formation in the presence of pH 3.5 10 mM nitric acid or pH 3.5 10 mM formic acid hole scavenger. Left side shows unirradiated controls and right side shows 10 Gy irradiated. N = 3 and all values ± SEM. b Data from a replotted as ‘real’ values (10 Gy irradiated value minus 0 Gy control) ± SEM