MYF6 (myogenic factor 6) is a basic helix-loop-helix transcription factor that plays a critical role in skeletal muscle differentiation and development. As a member of the MyoD family, MYF6 functions as a sequence-specific DNA-binding protein that regulates muscle gene expression during myogenesis 1. The protein shows high evolutionary conservation, with 99% and 97% amino acid identity between pig and cow/human respectively 1. Single-cell RNA sequencing has identified MYF6+ satellite cells as a distinct subpopulation involved in muscle regeneration, with higher proportions found in soleus muscle 2. Functionally, MYF6 is essential for embryonic viability, as porcine embryos lacking MYF5/MYOD/MYF6 show complete absence of skeletal muscle formation, severe skeletal abnormalities, and embryonic lethality after day 62 3. The gene's expression is subject to posttranscriptional regulation through upstream AUG codons that reduce translation efficiency 4. Interestingly, MYF6 expression has been found in non-muscle contexts, being universally expressed in hairy cell leukemia and serving as a potential biomarker for this B-cell malignancy 5. Additionally, vitamin D deficiency affects muscle strength through VDR signaling pathways, with MYF6-expressing muscle showing reduced SERCA expression in knockout models 6.