Tg(Pbsn-cre)4Prb O PbCre4 ARR2PB-Cre http://identifiers.org/mgd/MGI:2388169 PB-Cre4 transgene insertion 4, Pradip Roy-Burman transgene PbCre4|PB-Cre4|ARR2PB-Cre Transgene MGI:2388169