10:20 AM
() Chair's Introduction. (Abstract )

10:30 AM
(S5A-1) Crystal structure of cyanobacterial photosystem II at 3.2 resolution. (Abstract 89)
Jan Kern^*,1, Jacek Biesiadka², Bernhard Loll², Athina Zouni¹, Klaus-Dieter Irrgang¹, Wolfram Saenger², ¹ Max-Volmer-Laboratories for Biophysical Chemistry, Berlin, Germany² Institute of Crystallography, Free University of Berlin, Berlin, Germany

11:00 AM
(S5A-2) Mn₄Ca cluster of the water-oxidation enzyme studied by polarized X-RAY spectroscopy of PS II single crystals. (Abstract 90)
Junko Yano^{1, 3}, Jan Kern², Kenneth Sauer^{1, 3}, Johannes Messinger⁴, Athina Zouni², Vittal Yachandra^*,1, ¹ Lawrence Berkeley National Laboratory, Berkeley, USA³ University of California at Berkeley, Berkeley, USA² Technische Universitat Berlin, Berlin, Germany⁴ Max-Planck Institut fur Bioanorganische Chemie, Mulheim, Germany

11:20 AM
(S5A-3) High frequency EPR of the Mn-cluster in single crystals of cyanobacterial photosystem II. (Abstract 91)
Asako Kawamori¹, Jian-Ren Shen², Hiroyuki Mino^*,3, Kou Furukawa⁴, ¹ Kwansei Gakuin University, School of Science, Sanda, Hyogo, Japan² Okayama University Department of Biology, PRESTO JST Saitama, Okayama, Japan³ Nagoya University, Department of Physics, Nagoya, Aichi, Japan⁴ Institute of Molecular Science, Okazaki, Aichi, Japan

11:40 AM
(S5A-4) Bacterial reaction centers with a functional manganese binding site. (Abstract 92)
Megan Theilges, Laszlo Kalman, Gregory Uyeda, Ana Camara-Artigas, Russell LoBrutto, JoAnn Williams, James Allen^*,1, ¹ Center for the Study of Early Events in Photosynthesis, Tempe, AZ, USA

12:00 PM
(S5A-5) Absence of large-scale displacement of functional Q_B in bacterial reaction centers. (Abstract 93)
Jacques Breton^*,1, Eliane Nabedryk¹, ¹ Service de Bioénergétique; CEA-Saclay;, France