Biochemistry, Genetics and Molecular Biology
8 years ago

Newly discovered free radical in spinach chloroplasts could revolutionize solar energy.

Proceedings of the National Academy of Sciences
Detection of a Free Radical in the Primary Reaction of Chloroplast Photosystem II
Richard Malkin, Alan J. Bearden

Paper Summary

A new free radical signal was discovered in spinach chloroplasts when illuminated at 77°K with specific light. This signal only appears when an oxidant is present before illumination. The signal is linked to the primary reaction of Photosystem II, not Photosystem I, based on its presence in Photosystem II-enriched fragments. The signal's characteristics suggest it may be related to the reaction-center chlorophyll of Photosystem II.

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