Table 3 Polymorphic sites and density for the three HSPA1 and five neighboring genes reveal that HSPA1A and HSPA1B have low mutational loads. These data are derived from the 1000-Genomes (1000 g) and ExAC datasets. (SNP Density = SNP N/Region Length).

From: Concurrent action of purifying selection and gene conversion results in extreme conservation of the major stress-inducible Hsp70 genes in mammals