"Msi2 knockout (KO) mice exhibited a decrease in both soleus #myofiber size and number compared to control mice. #Biochemical and #histological analyses revealed that type IIa fibers, which are of the fast type but have high #metabolic capacity, were decreased in Msi2 KO mice"

https://faseb.onlinelibrary.wiley.com/doi/10.1096/fj.202300563R