Relative expression of the STEAP3/TSAP6 alleles in normal controls. Electrophoregrams of sequencing reactions for cDNA (A) and genomic DNA (B) of a heterozygous control showing preferential allelic expression using the Rs6753006 SNP as a marker. The relative expression of the 2 alleles was calculated using the peak picker software for “quantitative” sequencing. The allelic expression ratio is indicated for 17 heterozygous controls for Rs6753006 (C) and for 12 heterozygous controls (D) for Rs3731603 (D). The correlation between the results obtained with the 2 markers is indicated for 9 controls who were heterozygous for both SNPs (E).