Missense mutation led to amino acid substitute at 660th locus, namely, serine which could be phosphorylated of yak and Chinese Simmental substitute to phenylalanine of small-tail Han sheep.

• 错义突变导致的第660位点氨基酸替换，牦牛和中国西门塔尔牛以可磷酸化的丝氨酸替代了小尾寒羊的苯丙氨酸。