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. Author manuscript; available in PMC: 2017 Oct 29.
Published in final edited form as: J Am Chem Soc. 2015 Feb 18;137(8):2792–2795. doi: 10.1021/ja510923m

Figure 2.

Figure 2

Comparison of the BV chromophore conformations as Pr in the three-dimensional X-ray crystal structures of the PAS-GAF fragment of DrBphP collected with a very low accumulated X-ray dose of ≤15 KGy (panel A) and a higher accumulated X-ray dose of 460–520 KGy (panel B) at 100 K. 2Fo–Fc electron density maps (blue for A and purple for B) were calculated to 1.7 Å resolution. Fo–Fc maps are shown in red (negative) and green (positive). Contour levels are 1σ for 2Fo–Fc maps and ±3σ for Fo–Fc maps.