Congenital Disorder of Glycosylation, Type if, also known as cdg1f, is related to congenital disorder of glycosylation, type in and congenital disorders of n-linked glycosylation and multiple pathway, and has symptoms including ataxia, seizures and dry skin. An important gene associated with Congenital Disorder of Glycosylation, Type if is MPDU1 (Mannose-P-Dolichol Utilization Defect 1). Affiliated tissues include skin and brain, and related phenotypes are intellectual disability, severe and type i transferrin isoform profile