My general area of interest is understanding biological redox reactions, primarily through the use of protein electrochemistry. We are currently investigating aspects of the redox chemistry of photosynthesis, the capture and chemical storage of light energy by photosynthetic bacteria and green plants. Although the overall photosynthetic process has been studied for a long time, many important molecular details are still unclear. In particular, the enzyme photosytem II (PSII), which strips electrons from water to make all of the atmosphere’s dioxygen, remains poorly understood. In close collaboration with students majoring in chemistry and biochemistry, I am studying PSII by direct electrochemical methods. These experiments will lead to greater understanding of this complex protein, and, in addition, the techniques we develop may be used to harness PSII (or a related catalyst) for use in artificial photosynthesis. Artificial photosynthesis holds the promise of using solar energy to split water into hydrogen and oxygen gas, providing a renewable source of fuel for the ‘hydrogen economy.’