ENU-induced A to G transition at base pair 86,547,526 (v38) on chromosome 1, or base pair 35,283 in the GenBank genomic region NC_000067 encoding Pde6d. The effect of the mutation at the cDNA and protein level have not examined, but the mutation is predicted to result in skipping of the 89-nucleotide exon 2 (out of 5 total exons), resulting in a frame-shifted protein product beginning after amino acid 17 and coding of a premature stop codon at amino after 53 aberrant amino acids (at amino acid 70).