ENU-induced T to C transition at base pair 13,647,083 (v38) on chromosome 13, or base pair 56,745 in the GenBank genomic region NC_000079 for the Lyst gene. The mutation corresponds to residue 4,222 in the mRNA sequence NM_010748 within exon 11 of 53 total exons. The mutation results in substitution of cysteine (C) 1,347 to a premature stop codon (C1347*) in the protein.