ENU-induced G to A transversion at base pair 55,166,251 (v38) on chromosome 13, or base pair 13,434 in the GenBank genomic region NC_000079 encoding Fgfr4. The mutation corresponds to residue 1,939 in the mRNA sequence NM_008011 within exon 13 of 18 total exons. The mutation results in a valine (V) to methionine (M) substitution at position 593 (V593M) in the FGFR4 protein.