This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 Protein and 4 guide sequences TCTTTGCTACATACGACGAGAGG, TGGAGCCCATGTCAACCCTGCGG, CCCATGTCAACCCTGCGGTCACT, TTGCTACATACGACGAGAGGCGG, which resulted in a Indel. (J:265051)