Inserted expressed sequence http://identifiers.org/mgd/MGI:2679595 Tg(MMTVPyVT)634Mul TgN(MMTVPyVT)634Mul MMTV-PyMT MGI:2679595 Tg(MMTV-PyVT)634Mul MMTV-PyVmT MTAG TgN(MMTVPyVT)<634Mul> transgene insertion 634, William Muller PyV-mT PyMT PyVT MT634