STUDIES ON THE SERUM PROTEIN IN YAK POPULATION

The serum proteins in three yak populations of Qinghai Guoluo, Tianjun and Haiyan have been examined using the technique of two dimensional polyacrylamide gel electrophoresis,the patterns of which have much in common, all having more than 100 polypeptides; The electrophoresis patterns of Guoluo and Tianjun populations are quite similar, both differ distinctly from that of Haiyan population in 4 peptides;Based on the results of electrophoresis and the results from former authors,possible causes that led to the difference between highland yak and lakeland yak as well as the taxonomic status of them are discussed. This study provides biological information for further studies on taxonomy and evolution of yak.