2:40 PM
() Chair's Introduction. (Abstract )

2:50 PM
(S2A-1) Control of function by protein-cofactor interaction in the electron transfer chain of Photosystem I. (Abstract 23)
Dietmar Stehlik^*,1, Yulia Pushkar¹, Irina Karyagina¹, Sarah Brown², Art van der Est², John Golbeck³, ¹ Freie Universität Berlin, Berlin, Germany² Brock University, Ontario, Canada³ Penn State University, PA, United States

3:20 PM
(S2A-2) A new model for the energy transfer and early electron transfer processes in Photosystem I. (Abstract 24)
Alfred Holzwarth^*,1, Marc Müller¹, Jens Niklas¹, Wolfgang Lubitz¹, ¹ Max-Planck-Institut für Bioanorganische Chemie, Mülheim a.d. Ruhr, Germany

3:40 PM
(S2A-3) The P₇₀₀^*A₁ TO P₇₀₀⁺A₁^- step in PSI is entropy driven. (Abstract 25)
Jian-Min Hou¹, DAvid Mauzerall^*,2, ¹ Gonazaga University, Spokane, Washington, USA² Rockefeller University, New York, NY, USA

4:00 PM
(S2A-4) A₁ reduction in intact cyanobacterial Photosystem I studied using time-resolved step-scan fourier transform infra-red difference spectroscopy in combination with isotope labeling and quinone exchange experiments. (Abstract 26)
Gary Hastings^*,1, Velautham Sivakumar¹, ¹ Department of Physics and Astronomy, Atlanta, GA, USA

4:20 PM
(S2A-5) Secondary electron transfer in Photosystem I: What transient absorption can tell. (Abstract 27)
Martin Byrdin^*,1, Rachel Cohen², Wendy Fairclough³, Feifei Gu⁴, John Golbeck², Peter Heathcote³, Kevin Redding⁴, Fabrice Rappaport¹, ¹ IBPC Paris, France² Pennsylvania State University, USA³ University of London, UK⁴ University of Alabama, USA