Wnt9b^tm1.2Amc

A targeting vector was designed to insert a loxP site just upstream of exon 2, and a frt-flanked PGK-Neo cassette followed by a second loxP site just downstream of exon 2 of the targeted gene to generate Wnt9bMtm1Amc mice (Wnt9bcneo. To remove the frt-flanked selection cassette, these mice were then bred to an FLPe-expressing strain (on the Swiss-Webster genetic background). The resulting Wnt9bc offspring carry a loxP site just upstream of exon 2, and a single remaining frt-site followed by a second loxP site just downstream of exon 2. (J:100575)