This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences CCTAGTGCCTACATAAGCCTTAT, CCTACCTGCCGGCAGATTAGGTC, CCTGCCGGCAGATTAGGTCCTGC, TTATCAGTTGTAGTTTAGTGTGG, which resulted in a Exon Deletion. (J:265051)