This allele from IMPC was generated at Welcome Trust Sanger Institute by injecting CAS9 RNA and 4 guide sequences CCTATAAGTCAGATCTGACTGCT, TAGGGATTTAGCCTGATTAGTGG, CCAAAGCTAGTTCCTCAAAATCG, ATAATCTGATTAGATATAGTAGG, which resulted in a Exon Deletion. (J:265051)