transgene insertion 25-4, David L Garbers Tg(Col2a1-Npr2*B2)25-4Gar Inserted expressed sequence Tg(Col2a1-Npr2)25-4Gar http://identifiers.org/mgd/MGI:3722765 MGI:3722765 GCB2-Tgm Tg(Col2a1-Npr2)254Gar