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Figure 5
Comparison of the heme site in chain A of McCP-β SSX structures. 2Fo − Fc maps of (a) the dark control structure and (c) the laser illuminated NO cage structure, both contoured at 1σ. (b) and (d)–(f) Omit maps contoured at 5σ for McCP-β SSX structures, either (b) soaked with PROLI NONOate, or from time-resolved datasets 1.44 s after NO release from the photocage, collected with laser powers of (d) 9.5 µJ, (e) 0.95 µJ and (f) 0.19 µJ. The NO occupancies in (b)–(f) are all 1.0.

IUCrJ
Volume 12| Part 5| September 2025| Pages 582-594
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525006645