Tg(Pax7-cre/ESR1)1Cbm MGI:3774422 Tg(Pax7-cre/ESR1)1Jejo http://identifiers.org/mgd/MGI:3774422 transgene insertion 1, Carmen Birchmeier Recombinase|Inducible Tg(Pax7-cre/ERT2)1Cbm Pax7<CreERT2>