This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences CCCCGAGAGCAGCCGGGCTTGCC, CCGGGCTTGCCCTGAACAAGCAC, TGTGCAAGCTACAGGAATACTGG, CCCAGTGTGCAAGCTACAGGAAT, which resulted in a Exon Deletion.