Core2GlcNAcT MGI:2681554 C2GlcNAcT-I<null> Null/knockout targeted mutation 1, Jamey Marth C2GlcNAcT<delta> C2GlcNAcT-I<-> http://identifiers.org/mgd/MGI:2681554 Gcnt1<tm1Jxm> C2GnT1<->