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. Author manuscript; available in PMC: 2015 Dec 12.
Published in final edited form as: J Mol Biol. 2014 Oct 13;426(24):3973–3984. doi: 10.1016/j.jmb.2014.10.005

Figure 7. The template strand +5 and +6 nucleotides interact with switch 1 and β’ clamp.

Figure 7

Light blue, DNA non-template strand; red, +5 and +6 template stand nucleotides; magenta, rest of DNA template strand; green, β’ clamp; brown, bridge helix; dark blue, switch 1; grey, rest of RNAP. The structure of RNAP complex with a downstream promoter fragment is from Ref. 19.