PPP2R2B and early-onset autosomal dominant Alzheimer disease: Based on an atlas of single cell gene expression from entorhinal cortex tissue samples (Grubman et al., 2019), PPP2R2B has lower expression in Alzheimer’s disease compared to controls in numerous cell types, with the strongest association in oligodendrocytes (FDR-corrected P  = 8.92 × 10−171).