Abstract
THE use of water as the electron donor and the consequent evolution of oxygen is one of the most important properties of photosynthesis by higher plants and algae. The properties of the enzyme systems involved in water oxidation are essentially unknown, however. Two new electron paramagnetic resonance (EPR) signals observed at low temperature in oxygen evolving chloroplasts are described here. The signals disappear and appear in response to short flash illumination, before freezing, of the chloroplasts, presumably due to changes in oxidation state of the components giving rise to the signals. The changes occur in response to a cycle of four flashes; it is suggested that they may reflect the oxidation states of the oxygen evolving system of the chloroplasts.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
