ENU-induced T to A transversion at base pair 75,652,808 (v38) on chromosome 5, or base pair 77,822 in the GenBank genomic region NC_000071.6 encoding Kit. The mutation corresponds to residue 2,703 in the mRNA sequence NM_021099.3 within exon 19 of 21 total exons. The mutation results in an isoleucine to asparagine substitution at position 881 (I881N) in the KIT protein.