ETFB and Neurodevelopmental delay: Furthermore, we identified methylation events on proteins highly associated with neurodevelopmental disorders (NDDs) at lysine residues for which there are reported NDD-associated clinical variants, including K462 of Heterogeneous nuclear ribonucleoprotein U (HNRNPU-K462), K200 of Electron transfer flavoprotein subunit beta (ETFB-K200), and K55 of Elongation factor 1-alpha 2 (EEF1A2-K55).