 Notably, this is not the same as the presence of Myf5 protein, which is involved in the development of many tissues.Additionally, muscle cells that were cultured with the transcription factor PRDM16 were converted into brown fat cells, and brown fat cells without PRDM16 were converted into muscle cells.The mitochondria in a eukaryotic cell utilize fuels to produce energy in the form of adenosine triphosphate (ATP).