OGG1 and glioblastoma: In addition, we analyzed markers of oxidative DNA damage by performing western blot for 8‐Oxoguanine glycosylase (OGG1) (Figure 3a,b) and immunofluorescence imaging of 8‐Oxoguanine (8‐oxoG) (Figure 3c,d), both indicating a significant increase in oxidative DNA damage in NA‐GBM samples.