ENU-induced A to G transversion at base pair 30,822,365 (v38) on chromosome 2, or base pair 12,924 in the GenBank genomic region NC_000068 encoding Ntmt1. The mutation corresponds to residue 568 in the mRNA sequence NM_170592 within exon 4 of 4 total exons. The mutation results in a histidine to arginine substitution at amino acid 140 (H140R) in the NTMT1 protein. (J:265230)