This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences: GGCTTGAGACCCAATCCGGT and CCTTTGCTCAACCATACACT. This resulted in a 592 bp deletion of Chr2:38,950,954-38,951,545 (GRCm38/mm10) and removes exon ENSMUSE00000336635. (J:188991)