Musculin is a protein that in humans is encoded by the MSC gene. [5] [6] [7]
The protein encoded by this gene is a transcriptional repressor capable of binding an E-box element either as a homodimer or as a heterodimer with E2A in vitro . The encoded protein also forms heterodimers with E2A proteins in vivo . This protein is capable of inhibiting the transactivation capability of E47, an E2A protein, in mammalian cells. This gene is a downstream target of the B-cell receptor signal transduction pathway. [7]