This ENU induced mutation has been identified as a C-to-T transition in exon 3, at nucleotide position 1042 of the cDNA sequence (transcript Scd2-201; ENSMUST00000026221), resulting in replacement of one codon for serine (AGC) by another (AGT) at amino acid position 109 of the protein (S109S) (NCBI m37, Ensembl build 62).