Figure 3.

Electron transfer pathways between aromatic amino acids in OxDC.A, Surface of chain A in gray. The five partially surface-exposed residues Y104, Y107, Y228, Y244, and Y283 stick out of the protein surface with their van der Waals spheres in element colors: C (green), O (red). B, Network of aromatic residues and nearest edge-to-edge distance for their aromatic rings. The N-terminal Mn is on the left and the C-terminal one on the right. The distances between the surface-exposed residues are shown with blue dashes. Distances between buried residues and between buried and surface-exposed residues are shown with red dashes.