Ferredoxin-NADP\^+ reductase (FNR) is an enzyme that catalyzes the transfer of electrons from ferredoxin to NADP\^+, producing NADPH during the light reactions of photosynthesis. This reaction is crucial for converting light energy into chemical energy, as NADPH serves as a reducing agent in various biosynthetic processes. FNR plays a key role in the electron transport chain of photosystems, linking the light capture process to the synthesis of energy-rich compounds.
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