This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences TTCAGCGAGAGCTGTGAGATAGG, CCTCATGCCCGGAAGGGTTTGCC, CCACAGCGGCGTGCTCTATCCTG, CCTTGAGAAAAATAGGACTTTGG, which resulted in a Exon Deletion.