四、 Gene for cell determination:myoD Somites体节 fibroblasts Mesodermal embryonic cell 成纤维细胞 中胚层细胞) overexpression myoD of myoD expression myotomes生肌节 muscle-Iike cells (skeletal muscle celD) myoblasts(成肌细胞, muscle cel四、Gene for cell determination: myoD Somites 体节 fibroblasts (Mesodermal embryonic cell 中胚层细胞) overexpression of myoD myotomes 生肌节 muscle-like cells. (skeletal muscle cell) myoblasts (成肌细胞,muscle cell) 成纤维细胞 myoD expression