Mn₄CaO₅ cluster that accumulates four oxidising equivalents via Kok S-state cycle (S₀→S₁→S₂→S₃→S₄→S₀) to couple 2 H₂O → O₂ + 4 H⁺ + 4 e⁻. The only biological apparatus that oxidises water.
Mn₄CaO₅ cluster that accumulates four oxidising equivalents via Kok S-state cycle (S₀→S₁→S₂→S₃→S₄→S₀) to couple 2 H₂O → O₂ + 4 H⁺ + 4 e⁻. The only biological apparatus that oxidises water.