the radius-vector R DZ joining the redox-active tyrosine residues YD and YZ in membrane-
oriented Mn-depleted preparation of photosystem II. The angle between R DZ and the
normal to the photosystem II membrane was determined to be 100°±2°, where the angle of
0° corresponds to the direction from YD towards the stromal side of the membrane, along the
membrane normal. A pulsed electron–electron double resonance method has been used to …