A table containing all common SNPs (minor allele frequency >0.05) from HapMap release #27 was downloaded from the BioMart HapMap site (http://hapmap.ncbi.nlm.nih.gov/biomart/martview) and the number of common SNPs within RefSeq NM gene exons, lincRNA exons and background loci divided by the number of genomic bases in each of these categories was determined. Fisher's exact test was used to calculate P values and error bars in Figure S7 represent 95% binomial proportion confidence intervals.
