Igh^tm1Mnz

PCR was used to introduce a point mutation conferring higher affinity 4-hydroxy-3-nitrophenyl)acetyl (NP)-binding to Igh-V (VHB1-8): TGG->TTG (codon 33 Trp->Leu). A targeting vector incorporating a 5' floxed neomycin cassette in addition to the point mutation was transfected into 129P2/OlaHsd-derived E14 embryonic stem (ES) cells. (J:75653)