|Mathematical Models for the pH Dependence of Oxygen Evolution under Fluoride Inhibition and Effects of Nitrite on Oxygen Evolution in Photosystem II
||Photosynthesis produces dioxygen at photosystem II (PSII), which is located in the thylakoid membrane of plant chloroplasts. Chloride (Cl-) is required for oxygen evolution activity and other anions are known to activate or inhibit O2 evolution. In t...
|Investigation of dialysis methods for the complete removal of Cl- from photosystem II
||"Photosystem II (PSII), which produces oxygen using light energy, requires Cl- as a cofactor. Cl- appears to be difficult to remove from PSII because there always remains residual activity of 25-40%. We have tested variations of the dialysis method t...
|Chloride requirement in photosystem II and anion effects in the S2' state of the oxygen evolving complex
||"The oxygen evolving complex (OEC) of photosystem II (PSII) requires chloride as a critical cofactor. The Cl- content of PSII was determined to be 1 Cl-/PSII by the AgCl colloid assay. The dissociation constant for Cl- in NaCl-washed PSII was determi...
|Calcium and chloride function in oxygen evolution by photosystem II through bisubstrate enzyme kinetics and EPR spectroscopy of fluoride inhibition
||Photosystem II (PSII) is the light-harvesting water oxidase of thylakoid membranes. The catalytic center where oxygen forms in PSII is located at the manganese cluster, Mn4O5Ca, which is highly conserved throughout nature as seen in cyanobacteria and...