Recombinase|Null/knockout Shh<tm1(EGFP/cre)Cjt> Shh<CreEGFP> Shh<gfpcre> Shh<cre/Gfp> Shhgfpcre targeted mutation 1, Clifford J Tabin MGI:3053959 Shh-GFP-Cre Shh-cre Shh<GFP-Cre> Shhgfp-Cre http://identifiers.org/mgd/MGI:3053959