targeted mutation 2, Dan R Littman http://identifiers.org/mgd/MGI:3026635 Reporter|Null/knockout MGI:3026635 Rorc(gammat)<-> Rorc<GFP> Rorc<tm2Litt> Rorc(gammat)-EGFP Roc(gt)<gfp> RORgammat-EGFP RORgammat