Netcast TWiV 242: I want my MMTV July 21, 2013 Tagged as: arenavirus, arms race, evolution, hemmorhagic fever, host-virus conflict, machupo virus, MMTV, mouse mammary tumor virus, parvovirus, Red Queen, retrovirus, transferrin receptor, viral, virology, virus The complete TWiV team talks about how two different viruses shape the evolution of an essential housekeeping protein.