This allele was generated at The Jackson Laboratory by electroporating Cas9 protein and 2 guide sequences CCACAATCCCAACAACTCAA and CTATCATTCCCCCTAACCAA, which resulted in a 304 bp deletion beginning at Chromosome 19 position 34,109,483 bp and ending after 34,109,786 bp (GRCm38/mm10). This mutation deletes ENSMUSE00000144872 (exon 3) and 186 bp of flanking intronic sequence including the splice acceptor and donor and is predicted to cause a change of amino acid sequence after residue 49 and early truncation 57 amino acids later. (J:188991)