This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences: CATGGCTGCTCGCTGTACCG and GCTCATGCGCTACATCCCGG. This resulted in a 678 bp deletion of Chr14:20,695,019-20,695,696 (GRCm38/mm10) and removes exon ENSMUSE00000234144. (J:188991)