Imp1<-> gene trap OST33739, Lexicon Genetics Null/knockout|Reporter Imp1<Beta-geo> Igf2bp1<Gt(Betageo)1Fcn> Zbp1<-> Igf2bp1<Gt(OST33739)Lex> MGI:3043746 http://identifiers.org/mgd/MGI:3043746