transgene insertion 1, Yuji Mishina MGI:3829210 Col1-CreER<TM> O http://identifiers.org/mgd/MGI:3829210 Col1-CreER<TM>|Tg(Col1a1-cre/ERT2)1Mis Transgene transgene Tg(Col1a1-cre/Esr1*)1Mis Tg(Col1a1-cre/ERT2)1Mis