Developmental and Epileptic Encephalopathy 21, also known as epileptic encephalopathy, early infantile, 21, is related to developmental and epileptic encephalopathy 7 and early infantile epileptic encephalopathy. An important gene associated with Developmental and Epileptic Encephalopathy 21 is NECAP1 (NECAP Endocytosis Associated 1), and among its related pathways/superpathways are Cardiac conduction and Neuropathic Pain-Signaling in Dorsal Horn Neurons. Affiliated tissues include brain and eye, and related phenotypes are decreased fetal movement and profound global developmental delay