Reduced levels of fusion GTPases in AD brain were consistently replicated by other groups (Kandimalla & Reddy, 2016; Manczak, Calkins, & Reddy, 2011), and our recent study demonstrated that Mfn2 ablation caused neurodegeneration and other AD‐related deficits in the hippocampus and cortex (Jiang et al., 2018). The gene discussed is MFN2; the disease is Alzheimer disease.