The statistical significance of the associations of SIDD sites with the five classes of genomic regions DTP, DIV, TAN, CON, and coding region are given as z-scores, the number of standard deviations by which the given value varies from what would be expected if SIDD sites were randomly located. Here binned sets of SIDD sites are used, bin 0 corresponding to SIDD sites with Gm ≤ 0, and bin i to sites with i – 1 < Gm ≤ i. A positive z-score indicates that the number of SIDD sites at the given type of region exceeds the value expected at random, whereas a negative z-score indicates that the actual number is smaller than what would be expected at random. The gray band is the threshold for statistical significance at the 0.001 level. Sites outside this band are significant at this level.
