ENU-induced T to A transversion at base pair 133,012,651 (v38) on chromosome 1, or base pair 17,937 in the GenBank genomic region NC_000067 encoding Mdm4. The mutation corresponds to residue 416 in the mRNA sequence NM_008575 within exon 4 of 12 total exons. The mutation results in a phenylalanine to isoleucine substitution at amino acid 47 (F47I) in the MDM4 protein. (J:265262)