Figure 6From: Investigation of tumor hypoxia using a two-enzyme system for in vitro generation of oxygen deficiencyIn vitro cell response to photon irradiation in the 72-h proliferation assay. Cells were incubated for 24 h under normoxia and hypoxia (2% O2) using the GOX/CAT system and a hypoxia chamber. The ratio vital treated to vital untreated cells was determined. Mean values and standard deviation. * p < 0.05.Back to article page