This allele from IMPC was generated at Medical Research Council Harwell by injecting CAS9 RNA and 4 guide sequences CTCCCCAGGGCATTTTAGCATGG, CCCCAGGGCATTTTAGCATGGGG, GGCGAGTCTCCCACCCTACTGGG, CCACCCTACTGGGACCTACAGAG, which resulted in a Exon Deletion. (J:237616)