This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences: CGAGAACCTTTTCTAAATCT and GTCTCTCTGAAACACACCGA. This resulted in a 419 bp deletion of Chr5:100,480,147-100,480,565 (GRCm38/mm10) that removes exon ENSMUSE00001057239. (J:188991)