Charge-Transfer Processes within the Isolated Tetramer Models of the Reaction Center .

Over the last two decades, advancements in structural resolution and spectral characterization have significantly enhanced our understanding of photosynthesis. However, the complexity of photosystem (PS) supercomplexes still presents challenges. In the reaction center (RSRC), the charge separation process begins with a charge-transfer (CT) step at the special pair (P), a dimer of bacteriochlorophyll a (BChl), which acts as the donor, and continues with electron transport through the active pigments.