Myostatin (GDF-8) is essential for proper regulation of skeletal muscle mass. Mutations make the myostatin gene inactive, resulting in variation from normal  phenotypes, including muscle hyperplasia and muscle hypertrophy. Myostatin mutated genes are known to be present in many breeds of beef cattle. There are 6 known disruptive Myostatin genes in cattle that are responsible for … Continue reading Myostatin E226X