NCIt definition : Human EDN3 wild-type allele is located in the vicinity of 20q13.32 and is approximately
26 kb in length. This allele, which encodes endothelin-3 protein, plays a role in
vasoconstriction. Mutation of the gene is associated with congenital central hyperventilation
syndrome, Waardenburg syndrome type 4B and increased susceptibility to Hirschsprung
disease (aganglionic megacolon).;