This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences GGAAGTTTTCTTATCCTAAAAGG, ACTTAGAAACTTATACCCCCAGG, CCCCCAGGACATTTTCTCTTCCA, CCAGGGTTCACGCACAGAGCCGG, which resulted in a Intra-exdel deletion. (J:265051)