This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences TAAATAGCACTAAACTTGCTGGG, TAGCACTAAACTTGCTGGGAAGG, AGTAGCATTTGATGCTACACAGG, ATCTATGCTGATCTGAAGATAGG, which resulted in a Exon Deletion. (J:237616)