Macroh2a2^tm1.1Peh

The targeting vector was designed to insert a loxP-flanked PGKneo cassette upstream of exon 2 and loxP site downstream of exon 2. Mutant mice were bred with mice carrying Tg(EIIa-cre)C5379Lmgd to remove exon 2 and the neo cassette. Polymorphisms near the gene demonstrated that the targeted gene is in a genomic region derived from the 129S4/Jae parent of the embryo from which the ES cell line was generated. (J:220524)