what are the two protein-pigment complexes in the thylakoid membranes that are used in the light reactions

Thylakoid membranes contain integral membrane proteins which play an important role in light harvesting and the light-dependent reactions of photosynthesis. There are four major protein complexes in the thylakoid membrane: Photosystems I and II; Cytochrome b6f complex; ATP synthase

the cell cycle is the final answer! : )

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