This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences CTTCTTTCACTAATGTAAGA and TTTTAGGGTAAGGGTCACGT, which resulted in a 2368 bp deletion beginning at Chromosome 7 position 102,679,556 bp and ending after 102,681,923 bp (GRCm38/mm10). This mutation deletes ENSMUSE00000366315 and ENSMUSE00000401581 (exons 4 and 5) and 2084 bp of flanking intronic sequence including the splice acceptor and donor and is predicted to cause a change of amino acid sequence after residue 174 and early truncation 66 amino acids later.