APP/Ld/2 Tg(Thy1-APP*V642I)2Vln transgene APP/V717I http://identifiers.org/mgd/MGI:3717495 Transgene transgene insertion 2, Fred Van Leuven MGI:3717495 O APP/Ld/2|Tg(Thy1-APP*V642I)2Vln|APP/V717I Tg(Thy1-APPLon)2Vln