Yet each one tells a different story: (a), how novel - to - dbSNP variants were
rare; (b), how
nonsynonymous variant frequencies are shifted to lower values relative to those of synonymous variants, (c), how this shift in allele frequencies is more pronounced for damaging nsSNPs, consistent with natural selection, and (d), how the sizes of observed indels are enriched for non-frameshift events divisible by 3.