C-Myc is a helix-loop-helix leucine zipper phosphoprotein that regulates gene transcription in cell proliferation, cell differentiation and apoptosis. Johnson, G. and L. Hersh, J. Biol. Chem., 269, 7682 (1994); Chou, T. et al. J. Biol. Chem., 270, 18961 (1995); Kato, G. and C. Dang, FASEB J., 6, 3065 (1992).
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