Contact: Lynn Yarris
DOE/Lawrence Berkeley National Laboratory
Caption: Photosytem II utilizes a water-splitting manganese-calcium enzyme that when energized by sunlight catalyzes a four photon-step cycle of oxidation states (S0-to-S3). When S3 absorbs a photon, molecular oxygen (O2) is released and So is generated. S4 is a transient state on the way to So.
Credit: SLAC Linear Accelerator Center
Usage Restrictions: None
Related news release: Postcards from the photosynthetic edge