Figure 4.

Model of the protein environment surrounding Tyr160 (TyrD) of photosystem II from T. vulcanus (PDB 3ARC). Distances shown (dashed lines) are in angstroms. Crystallographic waters [HOH(prox) = the “proximal” water, HOH(dist) = the “distal” water] are shown as small, red spheres. The directions of ET and PT are denoted by transparent blue and red arrows, respectively. The figure was rendered using PyMol.⁵⁴