transgene insertion 1, Gerard Karsenty MGI:3041865 Col1-Cre http://identifiers.org/mgd/MGI:3041865 alpha1(1) collagen-Cre Transgene alpha1(I)-Cre|alpha1(1) collagen-Cre|alpha1(I)collagen-Cre|Col1-Cre alpha1(I)-Cre O alpha1(I)collagen-Cre transgene Tg(Col1a1-cre)1Kry