This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 Protein and 4 guide sequences TGATAAACCCGGAATCAATCTGG, CCTCCGACCTGAGAACTTGACCA, CCGACCTGAGAACTTGACCAGTA, CTGCTAGCTAATGTCAAGAGAGG, which resulted in a Exon Deletion.