MYOG (myogenin) is a transcriptional activator essential for embryonic skeletal muscle differentiation and myogenic gene expression 1. As a basic helix-loop-helix transcription factor, MYOG promotes transcription of muscle-specific genes by binding E-box elements in promoter regions and cooperating with other myogenic regulatory factors including MYOD1, MYF5, and MEF2D to recruit chr1-remodeling complexes 2. MYOG facilitates terminal myoblast differentiation and cell cycle exit by upregulating miR-20a, which suppresses genes required for proliferation 1. The protein plays critical roles in muscle regeneration and atrophy responses; in aged muscle and sarcopenia models, MYOG expression correlates with regenerative capacity, and interventions increasing MYOG expression improve muscle mass and function 34. MYOG activity is regulated by phosphorylation via CAMK2G in response to muscle activity 1. Clinically, MYOG is upregulated during therapeutic interventions for muscle wasting conditions including glucocorticoid-induced atrophy, chr1 kidney disease-related sarcopenia, and Duchenne muscular dystrophy 14. MYOG expression is also modulated by epigenetic mechanisms; iron deficiency impairs MYOG expression through ferritinophagy-mediated reduction of histone H2B monoubiquitination at MYOG promoters, which contributes to impaired muscle regeneration 5. These findings establish MYOG as a central transcriptional hub regulating skeletal muscle development and regeneration with therapeutic potential across multiple atrophy conditions.