The cytochrome b6f complex is a crucial protein complex found in the thylakoid membranes of chloroplasts, playing a significant role in the light reactions of photosynthesis. It functions as an electron transport chain component, facilitating the transfer of electrons from plastoquinone to plastocyanin while contributing to the generation of a proton gradient that is essential for ATP synthesis. This complex also connects photosystem II and photosystem I, linking the two systems together in the process of harnessing light energy.
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