High incidence of propionic acidemia in greenland is due to a prevalent mutation, 1540insCCC, in the gene for the beta-subunit of propionyl CoA carboxylase.
Ravn K, Chloupkova M, Christensen E, Brandt NJ, Simonsen H, Kraus JP, Nielsen IM, Skovby F, Schwartz M. Am J Hum Genet. 2000 Jul; 67(1):203-6. Epub 2000 May 16.