ENU-induced G to T transversion at base pair 79,733,773 (v38) on chromosome 10, or base pair 17,140 in the GenBank genomic region NC_000076 encoding Hcn2. The mutation corresponds to residue 1,641 in the mRNA sequence NM_178666 within exon 6 of 8 total exons. The mutation results in substitution of glutamic acid 536 for a premature stop codon (E536*) in the HCN2 protein. (J:267669)