Serum albumin polymorphism in Indians of the southwestern United States.

This paper involves an examination of a series of individuals from Piman and Yuman speaking populations near Phoenix and Yuma in the south-western United States which were obtained by the Clinical field Studies Unit of the National Institute of Arthritis and Metabolic Diseases. Starch gel electrophoresis was carried out as described earlier, with the modification that sera were dilute 1/8 with 0.15 percent ferric ammonium citrate in the gel buffer to facilitate the screening of iron-saturated transferrin and serum albumin on the same gel. In the Piman and Yuman populations an albumin variant, migrating more slowly than the usual type, has been encountered.