Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA 94143-0502, USA.
Data recently published in BMC Biology provide insights into the normal physiological function of c-myc in the development and regeneration of the mammary gland and indicate a key role in epithelial cell proliferation, elaboration of ductal alveoli, and the biosynthetic capacity and milk production of the mature organ.