http://identifiers.org/mgd/MGI:2676327 MGI:2676327 Gja1<tm2(cre/ESR1)Kwi> Cx43<Cre-ER(T)> Recombinase|Inducible Gja1<tm5(cre/ERT)Kwi> Gja1<tm5(cre/ESR1)Kwi> targeted mutation 5, Klaus Willecke