Similarly, the oligodendrocyte precursor cells (OPCs) marker, neuron-glial antigen 2 (NG2), was localized to vesicles in the MDZ of control brains (Figures 3C2,C1) and AD brains (Figures 3D2,D1), and co-localized with oxidative stress marker Nrf2 in control brain (Figures 3C1,C3) and AD brain (Figures 3D1,D3). This evidence concerns the gene NFE2L2 and Alzheimer disease.