This allele from project Dusp15-8505J-0098M was generated at The Jackson Laboratory by injecting Cas9 RNA and 4 guide sequences CCTGTTGGTGAGCCTTGGGA, ACCAAGGTTGACCTTCGTGT, ACCAATAGAGAAGAGCTGCG and GTCTCAGGTAGAGATCAGGG, which resulted in a 553 bp deletion in total, beginning at Chromosome 2 negative strand position 152,950,921 bp, TGATCTCTACCTGAGACTTC, deleting 385 bp then retaining 4 endogenous bp (ACTT) in the intron, then removing 168 bp, and ending after AGGCTAAAGGCCCACACGAA at 152,950,365 bp (GRCm38/mm10). This mutation deletes exon 2 and 519 bp of flanking intronic sequence including the splice acceptor and donor and is predicted to cause a change of amino acid sequence after residue 7 and early truncation 79 amino acids later.