Methemoglobin reductase in three species of Bovidae.

Isoelectric focusing of red cell hemolysates revealed several isozymes that stain for NADH-methemoglobin reductase. Evidence for two different genetic loci controlling the banding patterns was obtained. One locus controlled a single band present in all animals tested. The second locus controlled ten different banding patterns that could be accounted for by four codominant alleles. Band B occurred in Bison bison. Bands A and C occurred in Bos indicus and band D occurred in both Bos indicus and Bos taurus. Bands A, C, and D were not observed in Bison bison and bands A, B, and C were not observed in Bos taurus.