myogen

例句：

1. 1. The myofibrils are the basic units of muscle contraction.
   肌原纤维是肌肉收缩的基本单位。
2. 2.Myogen activators are proteins that stimulate muscle growth.
   肌原激活剂是一类蛋白质，它们刺激肌肉生长。
3. 3.The myostatin gene is a key regulator of muscle growth and development.
   肌抑素基因是控制肌肉生长和发育的关键调节因子。