This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences: AAGCTTCTACATCTTGTGGA and CTACCGATCACGAGCTGTGA. This resulted in a 568 bp deletion of Chr4:108,575,138-108,575,705 (GRCm38/mm10) that removes exon ENSMUSE00000180481.