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Figure 2
(a) Structure of the hydrogenated Tetdron monomer (cyan) at equilibrium aligned with Padron0.9 `off-state' (magenta). (b) Structural alignment close-up of the chromophore site with surrounding residues of Tetdron (cyan) and Padron0.9 (magenta). (c) Electron-density map for the chromophore refined with 100% occupancy in the trans configuration for hydrogenated Tetdron at equilibrium (also see Supplementary Fig. S1). The grey mesh is a 2|Fo|−|Fc| electron-density map contoured at 1σ. (d) Solution UV–vis absorption spectra of Tetdron before (red line) and after (blue–grey and yellow lines) irradiation. The blue–grey spectrum was recorded after 400 nm irradiation, followed by 532 nm irradiation resulting in the yellow spectrum.

IUCrJ
Volume 6| Part 4| July 2019| Pages 619-629
ISSN: 2052-2525
https://doi.org/10.1107/S2052252519005761