Table 1.

Correlation between Chromosomal Distance (logD) and Average Expression Profile Similarity, Measured by ln[(1 + R)/(1 − R)], between Human-Linked Gene Pairs

Genomic Distance (D)	Pearson's r	Chance Probability
<1 Mb	−0.5808	<0.001
1–5 Mb	−0.4523	<0.001
5–25 Mb	−0.4416	<0.001
25–50 Mb	−0.2693	0.069
50–100 Mb	−0.2391	0.119

NOTE.—Correlations are calculated from subsets of gene pairs with different ranges of genomic distances (D). The chance probability of observing a correlation as strong as observed is determined from 1,000 permutated genomes. The original data points for the real human genome are shown in figure 2.