R1ag#5 R1AG-5 Tg(cre)2Szi|R1ag#5|R1AG-5|R1ag5 Tg(cre)2Szi O transgene insertion 2, Scott Zeitlin MGI:2177767 R1ag5 transgene Transgene Tg(Camk2a-cre)2Szi http://identifiers.org/mgd/MGI:2177767