This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences ATAGGTAAGATAAGAACCAT and GTATAAGAGTATTTAAGGAG, which resulted in a 364 bp deletion beginning at Chromosome 17 position 71,518,724 bp and ending after 71,519,087 bp (GRCm38/mm10). This mutation deletes ENSMUSE00000137722 (exon 6) and 261 bp of flanking intronic sequence including the splice acceptor and donor and is predicted to cause a change of amino acid sequence after residue 159 and early truncation 4 amino acids later.