transgene Tg6799|5XFAD line Tg6799|5XFAD O Transgene Tg(APPSwFlLon,PSEN1*M146L*L286V)6799Vas http://identifiers.org/mgd/MGI:3693207 5XFAD transgene insertion 6799, Robert Vassar Tg6799 MGI:3693207 5XFAD line Tg6799