This allele from IMPC was generated at Welcome Sanger Institute by injecting CAS9 RNA and 4 guide sequences ACGGTGCCCAGCTAGACACAAGG, CCACGTTGGAGTATTACTACTCA, TGAACTTGCGCGCACCACCCTGG, CCGGCTCACACAACCCACCGTGG, which resulted in a Whole-gene deletion. (J:265051)