Photosystem I
Definition
Photosystem I is a protein complex involved in photosynthesis that uses light energy to transfer electrons from plastocyanin to ferredoxin, leading to the production of NADPH.
Analogy
Think of Photosystem I as a solar panel. It absorbs sunlight (light energy) and converts it into electricity (electron flow), which is then used for various purposes, like charging batteries (producing NADPH).
Related terms
Plastocyanin: A small protein involved in electron transport within the chloroplasts during photosynthesis.
Ferredoxin: An iron-sulfur protein that mediates electron transfer in a range of metabolic reactions.
NADPH (Nicotinamide adenine dinucleotide phosphate): A coenzyme used in anabolic reactions, such as lipid and nucleic acid synthesis, which require NADPH as a reducing agent.
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