Bowling A T, Wictum E
Serology Laboratory, School of Veterinary Medicine, University of California, Davis 95616.
Anim Genet. 1988;19(1):47-9. doi: 10.1111/j.1365-2052.1988.tb00788.x.
A fourth allele at the horse erythrocyte phosphohexose isomerase (Phi) locus was proposed to account for phenotypes observed after starch gel electrophoresis and enzymatic staining of red cell lysates from American Saddlebred and Tennessee Walking Horse breeds. The gene was rare, having an estimated frequency of 0.009 in 949 Saddlebreds tested.