Osx1-GFP::Cre|osterix-Cre Osx1-GFP::Cre MGI:3689349 http://identifiers.org/mgd/MGI:3689349 Tg(Sp7-tTA,tetO-EGFP/cre)1Amc Transgene transgene transgene insertion 1, Andrew P McMahon osterix-Cre O