Intellectual Developmental Disorder, X-Linked, Syndromic, Hedera Type, also known as mrxsh, is related to syndromic x-linked intellectual disability hedera type. An important gene associated with Intellectual Developmental Disorder, X-Linked, Syndromic, Hedera Type is ATP6AP2 (ATPase H+ Transporting Accessory Protein 2). Affiliated tissues include brain, and related phenotypes are intellectual disability and bilateral tonic-clonic seizure