This allele from IMPC was generated at Welcome Trust Sanger Institute by injecting CAS9 RNA and 4 guide sequences CCAGCTTAGTCAGGGATCTGGTC, GTGGACACTCTTACTCACAGTGG, TCAAGACGTAGCGTTTGCTGAGG, TCCCCCAACTCAATCTGGGATGG, which resulted in a Exon Deletion. (J:237616)