This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences: CTACTCGCTCAGGTGATGCA and GTCACTGGCGACCACTTAAA. This resulted in a 494 bp deletion of Chr4:115,787,947-115,788,440 (GRCm38/mm10) that removes exon ENSMUSE00001308321. (J:188991)