BJR -- Anoopkumar-Dukie et al. 78 (934): 945 Figure 1

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Figure 1. (a) Resazurin reduction, (b) colony formation and (c) BrdU incorporation by HeLa cells 7 days (a, c) or 12 days (b) after irradiation at 2–8 Gy under normoxia ( ${square}$ ) or hypoxia ( ${blacksquare}$ ). Data are means±standard deviation for three independent experiments. OER, oxygen enhancement ratio calculated at 60% of unirradiated control values.