Iron-Sulfur Clusters

Iron-sulfur compounds, denoted by FeS, serve as in photosynthesis as electron transporters from Photosystem I to Ferredoxin in the electron transport process. Three such iron-sulfur clusters have been identified as a part of Photosystem I.

Iron-sulfur clusters also play a role in electron transport in the mitochondrial membrane. They play a role in both Complex I and Complex II in the electron transport chain.