ENU-induced T to A transversion at base pair 20,580,651 (v38) on chromosome 18, or base pair 22,578 in the GenBank genomic region NC_000084 encoding DSG2. The mutation corresponds to residue 889 in the mRNA sequence NM_007883 within exon 6 of 15 total exons. The mutation results in substitution of tyrosine 226 for a premature stop codon (Y226*) in the DSG2 protein.