Left: Pearson’s correlation coefficients across all libraries, hierarchically clustered. Construct background and insertion position are indicated. Right: activity of pTRP1-based constructs, as log 2 (gene expression), compared between upstream (top, r = 0.92, n = 11,966) and downstream (middle, r = 0.85, n = 11,817) libraries of Arabidopsis and tomato and between upstream and downstream libraries of Arabidopsis (bottom, r = 0.13, n = 11,813).