ENU-induced C-to-A mutation at base pair 65,124,891 (GRCm38) on chromosome 4, or base pair 718 in the GenBank genomic region NC_000070. The mutation corresponds to residue 718 in the mRNA sequence NM_021362 within exon 1 of 22 total exons. The mutation results in a threonine to lysine substitution at position 117 (p.T117K) in the encoded peptide.