Fotosysteemissä
Fotosysteemissä, or photosystem, refers to a complex of proteins and pigments embedded in the thylakoid membranes of chloroplasts and cyanobacteria. These complexes are crucial for the light-dependent reactions of photosynthesis, the process by which light energy is converted into chemical energy. There are two main types of photosystems: Photosystem II (PSII) and Photosystem I (PSI).
Photosystem II is the first photosystem in the photosynthetic electron transport chain. Its primary function is
Photosystem I receives the electrons from PSII and uses further light energy to energize them. These high-energy