In the Piedmont cattle,the myotatin sequence contains a mis sense mutation in exon 3,resulting i n a substitution of tyrosine for an in variant cysteine in the mature region of the protein,which i s consistent with other reports previously.

• 对PCR扩增片段克隆、测序结果显示,2头皮埃蒙特牛均在编码序列938处发生G到A突变,使编码氨基酸由半胱氨酸变为酪氨酸,符合前人检测结果。