This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 Protein and 4 guide sequences TACTTCGAGTCTGTCAGCAATGG, TGTCACTTGCATGCTAGTGCCGG, CCACCCATGAGTTTGGCATCATG, GTTTGATTCCGGAGCCACTATGG, which resulted in a Exon Deletion.