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.