This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences ATTTACAAAGGAGATACGCA and CTGATTGTATGATAACGCAA, which resulted in a 425 bp deletion beginning at Chromosome 4 position 97,574,571 bp and ending after 97,574,995 bp (GRCm38/mm10). This mutation deletes ENSMUSE00001276782 (exon 4) and 322 bp of flanking intronic sequence including the splice acceptor and donor. (J:188991)