Function
This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII), and is essential for PSII function (PubMed:12655396). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.