Fig. 3: Ferredoxin (Fd) and PSI binding interfaces.
From: Structure of cyanobacterial photosystem I complexed with ferredoxin at 1.97 Å resolution
Each interface involved in binding is presented separately in open-book style. Directly interacting amino acid residues and water molecules are labeled. a, b For Fd:PsaA, c, d for Fd:PsaC, e, f for Fd:PsaE. Newly identified residues involved in the interaction are labeled in red. All protein surfaces are colored according to the electrostatic potential (positive in blue, negative in red).
