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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: J Photochem Photobiol B. 2011 Mar 3;104(1-2):51–59. doi: 10.1016/j.jphotobiol.2011.02.019

Figure 4.

Figure 4

a) Schematic of PS II membranes showing the orientation of the membrane plane.

b) Fourier Transform (FT) of Mn K-edge EXAFS spectra from oriented PS II membrane samples in the S1 state obtained with a high-resolution spectrometer (range-extended EXAFS). Angles indicate orientation of the membrane normal with respect to the X-ray e-field vector. FT peak IIIA and IIIB are from Mn-Mn and Mn-Ca vectors.

c) The orientation of the average Mn-Ca (~3.4 Å) and the Mn-Mn (~3.2 Å) vectors relative to the membrane normal.