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Mechanical coupling between the RNAPs transcribing neighboring genes is dependent on their relative orientation. Each panel shows the distribution of the average velocity of the RNAPs transcribing gene B when gene A is ‘off’ (
) and when gene A is ‘on’ (
s-1). The average RNAP velocities are in units of bp·s−1. The histograms in each panel exhibit similar trends despite a 20-fold change in the intergenic distance. kbp: kilo base pairs
