This allele from IMPC was generated at Welcome Sanger Institute by injecting CAS9 RNA and 4 guide sequences GCCTGAGGCTGCTTAGATACAGG, GGCTCCAAATCCCATGACAAAGG, CCACTGCTGGGTGGTCACACAAA, CTCCCAGTATGTTGCATGTGTGG, which resulted in a Exon Deletion. (J:265051)