Table 4 summarizes the results of tagSNP selection using this method, including the number of variants available per gene and the resulting number of tagSNPs. 340 tagSNPs (32%) represent 1045 HapMap SNPs, whereas 462 tagSNPs (67%) represent 684 gene re-sequencing variants. Our approach selected 682 tagSNPs that represent 1550 variants, representing a 56% reduction of variants that need to be genotyped to represent the entire set. The majority of tagSNPs are actual SNPs, whereas, exclusively in the re-sequencing set, a few ‘tagSNPs’ refer to insertions or deletions.