1. Also 3 different forms of actin were identified during myogenesis . 2. This gene is involved in cardiac morphogenesis and myogenesis and vascular development. 3. Myf5 is considered to be the earliest expressed regulatory factor gene in myogenesis . 4. The SIX1 gene plays a critical role in hypaxial muscle differentiation in myogenesis . 5. There are 3 types of proteins produced during myogenesis . 6. Class A proteins are the most abundant and are synthesized continuously throughout myogenesis . 7. Class B proteins are proteins that are initiated during myogenesis and continued throughout development. 8. Therefore, alternative splicing is necessary in myogenesis . 9. The shorter form is found to stimulate myogenesis . 10. The encoded protein may play a role in the regulation of vertebrate limb myogenesis .