title: GSM3891574: wild-type S2 cells, TAF1 dsRNA knockdown, Replicate 3; Drosophila melanogaster; OTHER
library_construction_protocol: Nuclear run-on experiments were performed as described previously (Mahat, D. B., Kwak, H., Booth, G. T., Jonkers, I. H., Danko, C. G., Patel, R. K., et al. (2016). Base-pair-resolution genome-wide mapping of active RNA polymerases using precision nuclear run-on (PRO-seq). Nature Protocols, 11(8), 1455–1476. http://doi.org/10.1093/bioinformatics/btq033) with the following modification. The final concentration of non-biotinylated CTP was raised from 0.25uM to 25uM, and the final library clean up and size selection was accomplished using 1X AMPure XP (Beckman).