
Photosystems are functional and structural units of protein complexes involved in photosynthesis that together carry out the primary photochemistry of photosynthesis: the absorption of light and the transfer of energy and electrons. They are found in the thylakoid membranes of plants, algae and cyanobacteria (in plants and algae these are located ...
Found on
http://en.wikipedia.org/wiki/Photosystem

organized unit of pigments found within a photosynthetic membrane, containing both a light-harvesting complex and a reaction center
Found on
https://courses.lumenlearning.com/microbiology/chapter/glossary/
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