This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences TTTCCTTAGAGTGTCCAGCCAGG, CTGCCCAGGGGTCAGAATAGAGG, GACGGTCCCTGCTTATCAACAGG, CCAAGGTCACAGGGCACAACCGC, which resulted in a Exon Deletion.