Developmental and Epileptic Encephalopathy 2, also known as epileptic encephalopathy, early infantile, 2, is related to rett syndrome and microcephaly, and has symptoms including constipation, myoclonus and difficulty sleeping. An important gene associated with Developmental and Epileptic Encephalopathy 2 is CDKL5 (Cyclin Dependent Kinase Like 5), and among its related pathways/superpathways are Neuropathic Pain-Signaling in Dorsal Horn Neurons and G-Beta Gamma Signaling. Affiliated tissues include eye and brain, and related phenotypes are global developmental delay and eeg with generalized slow activity