ACTL6B and neurodevelopmental disorder: Within the last 4 years, several reports have been published describing mutations in the BAF complex subunit Baf53b in the neurodevelopmental disorders Developmental and epileptic encephalopathy-76 (DEE76) and ASD (Bell et al., 2019; Fichera et al., 2019; Maddirevula et al., 2019; Yüksel et al., 2019; Wenderski et al., 2020).