ENU-induced T to C transition at base pair 126,923,594 (v38) on chromosome 2, or base pair 9,669 in the GenBank genomic region NC_000068 encoding the gene. The mutation corresponds to residue 830 in the mRNA sequence NM_023220 within exon 6 of 15 total exons. The mutation results in a serine (S) to proline (P) substitution at position 203 (S203P) in the protein.