Tg(Prrx1-Hand2)3Eno http://identifiers.org/mgd/MGI:2652062 transgene insertion 3, Eric N Olson Transgene O delta1-90|prx-delta1-90|Tg(Pr2x1-Hand2)3Eno prx-delta1-90 transgene MGI:2652062 delta1-90 Tg(Pr2x1-Hand2)3Eno