Intellectual Developmental Disorder, X-Linked 63, also known as mental retardation, x-linked 68, is related to non-syndromic x-linked intellectual disability 63 and amme complex. An important gene associated with Intellectual Developmental Disorder, X-Linked 63 is ACSL4 (Acyl-CoA Synthetase Long Chain Family Member 4). Affiliated tissues include brain, and related phenotypes are intellectual disability and delayed speech and language development