Intellectual Developmental Disorder, X-Linked, Syndromic 33, is also known as mental retardation, x-linked, syndromic 33. An important gene associated with Intellectual Developmental Disorder, X-Linked, Syndromic 33 is TAF1 (TATA-Box Binding Protein Associated Factor 1). Affiliated tissues include eye and brain, and related phenotypes are intellectual disability and global developmental delay