Mechanisms of long-distance electron transfer in proteins: lessons from photosynthetic reaction centers.

ELECTRON TRANSFER REACTIONS I THE REACTION CENTER ............................................. 275 Summary of Reactions To Be Considered ................................................................. 275 Electric Field Effects on Electron Transfer Reactions ............................................... 278 Electric Field Effects on the Initial Charge Separation .............................................. 280 Electric Field Effects on P~-QX Recombination ......................................................... 288 ELECTRON TRANSFER IN OTHER P OTEINS ....................................................................... 291 General Comparisons ................................................................................................ 291 Modified Proteins in Physiological Complexes .......................................................... 292 Rulhenated Proteins ................................................................................................. 294