KMT2A and memory impairment: Since reduced neuronal expression of Kmt2a and corresponding genome‐wide reduction of H3K4me3 has been linked to memory impairment and AD (Gjoneska et al, 2015; Kerimoglu et al, 2017), these data point to the possibility that altered H3K4‐methylation may—at least in part—underlie the observed down‐regulation of neuronal genes in CamkIIδc TG mice.