11. MEGF10 is a regulator of satellite cell myogenesis . 12. Nevertheless, the combination of MyoD and Myf5 is vital to the success of myogenesis . 13. Pitx2 plays a role in limb myogenesis . 14. There are a number of stages ( listed below ) of muscle development, or myogenesis . 15. Gain and loss of this ligand in neural crest cells results in delayed or premature myogenesis . 16. The expression of Pitx2 saves MyoD gene expression and keeps expressing this gene for limb myogenesis . 17. Although Myf5 is mainly associated with myogenesis , it is expressed in other tissues as well. 18. To re-activate myogenesis , the satellite cells must be stimulated to differentiate into new fibers. 19. As stated earlier, the combination of Myf5 and MyoD is crucial to the success of myogenesis . 20. A transcription factor ( TCF4 ) of connective tissue fibroblasts is involved in the regulation of myogenesis .