Figure 6.

Schematic illustration of the behavior of the dielectric matrix in stationary and transient electric fields—leading to the formation of the PSII_L state. A, Charge-separated closed state of dark-adapted PSII, generated by a STSF; B, perturbation of the ${\mathrm{Q}}_{\mathrm{A}}^{-}$ stationary field by a transient charge separation; C, fully relaxed charge-separated state (PSII_L) formed after several transient charge separation events. The circles represent the primary redox cofactors in the RC and the schematic dipoles illustrate the readjustment of the dielectric matrix to the local electric field, represented by the field vectors (arrowed lines). For the corresponding potential profiles, see Supplemental Figure 11.