Developmental and Epileptic Encephalopathy 95, is also known as glycosylphosphatidylinositol biosynthesis defect 18. An important gene associated with Developmental and Epileptic Encephalopathy 95 is PIGS (Phosphatidylinositol Glycan Anchor Biosynthesis Class S). Affiliated tissues include pons and skin, and related phenotypes are seizure and ataxia