This allele from IMPC was generated at Welcome Trust Sanger Institute by injecting CAS9 RNA, 4 guide sequences CCTCACAACGTCCTCCCAAGGCC, GCTTCATCATCACTACTAGCTGG, AGTTTCTTTGGAGTCGGACAAGG, CCAATTGATTGGCCTAAAGCAAT, and a non-contributing oligo, which resulted in a Exon Deletion. (J:265051)