Col1a1<tm1(CAG-Sirt1)Dsin> targeted mutation 1, David Sinclair ColA1<flox-STOP-Sirt1> SIRT1<STOP> Col1a1<Sirt1-Tg flox-STOP-flox> MGI:4430570 http://identifiers.org/mgd/MGI:4430570 Conditional ready|Inserted expressed sequence