Ins-Cre Tg(Ins2-cre)25Mgn [RIP]-Cre RIP2<Cre> RIP2-cre Recombinase Ins2cre transgene insertion 25, Mark A Magnuson Rip-cre MGI:2176227 TgN(ins2-Cre)25Mgn RIP Cre http://identifiers.org/mgd/MGI:2176227 RIPCre M line