FIGURE 3.

EXAFS spectra of the Mn in PSII multiplayer preparations exposed for 0 min (intact PSII control, upper row) and 180 min (hexaquo Mn²⁺-state, lower row) to 47°C. (Left column), k³-weighted EXAFS spectra in the k-space; (right column), the respective Fourier transforms. The FTs were calculated for data points ranging from 25–540 eV using an energy threshold of E₀ = 6546 eV. Control PSII (upper row): (solid line), experimental spectrum; (dashed line), a fit with six shells of backscatterers (fit no. 8, Table 2). PSII heated for 180 min (lower row): (solid line), experimental spectrum; (dashed line), a fit with a single shell of oxygen backscatterers.