This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences ATAGGCGAGGAGAATATGGA and ACGCTGTCATACTCAAAGGG, which resulted in a 1313 bp deletion beginning at Chromosome 17 position 46,890,571 bp and ending after 46,891,883 bp (GRCm38/mm10). This mutation deletes ENSMUSE00000323360 (exon 1) and 149 bp of flanking intronic sequence including the splice acceptor, donor and start site is predicted to generate a null allele.