Intellectual Developmental Disorder, Autosomal Dominant 6, with or Without Seizures, also known as mental retardation, autosomal dominant 6, with or without seizures, is related to autosomal dominant intellectual developmental disorder 6 and angelman syndrome. An important gene associated with Intellectual Developmental Disorder, Autosomal Dominant 6, with or Without Seizures is GRIN2B (Glutamate Ionotropic Receptor NMDA Type Subunit 2B). Affiliated tissues include brain, and related phenotypes are intellectual disability and global developmental delay