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Figure 7
Dose-dependent electron-density changes at the active and pre-bound sites of chain A (top, purple) and chain B (bottom, green). The ΔFdose map is contoured at ±2.5σ and represented as a green (positive) and purple (negative) mesh. Negative features at H2Oax and H2Oeq in both chains indicate photoreduction of the active-site copper in both chains. Negative ΔFdose features at the dioxygen species in chain A and Glu30 in chain B indicate that specific radiation damage affects this pre-bound dioxygen site more than the other. ΔFdose density at the copper site shows adjacent positive and negative features, consistent with a slight dose-dependent shift of the copper position.

Journal logoSTRUCTURAL
BIOLOGY
ISSN: 2059-7983
Volume 82| Part 8| August 2026| Pages 900-914
https://doi.org/10.1107/S205979832600639X
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