ENU-induced G to A transition at base pair 91,723,471 (v38) on chromosome 6, or base pair 39,426 in the GenBank genomic region NC_000072. The mutation corresponds to residue 476 in the mRNA sequence NM_009320 within exon 4 of 6 total exons. The mutation results in a glycine (G) to aspartic acid (D) substitution at position 60 (G60D) in the protein.