NCIt definition : Human GMPPA wild-type allele is located in the vicinity of 2q35 and is approximately
15 kb in length. This allele, which encodes mannose-1-phosphate guanylyltransferase
regulatory subunit alpha protein, is involved in the metabolism of GDP-mannose. Mutations
in the gene are associated with alacrima, achalasia, and impaired intellectual development
syndrome.;