Photosystem

Future prospects for clean, green, renewable energy may hinge upon our ability to mimic and improve upon photosynthesis -- the process by which green plants, algae and some bacteria convert solar energy into electrochemical energy. An artificial version of This electron density map of the manganese-calcium cluster in the photosystem II complex showed that the cluster was not dislocated by the LCLS X-ray beams before image data was acquired, proof that the probe-before-destroy approach is feasible for this Figure 1: Experimental schemes for the time-resolved serial femtosecond crystallography experiments on photosystem II. Extended Data Fig. 4: R split as a function of resolution bins and number of indexed patterns. Extended Data Fig. 6: Omit map of the dark Photosynthesis, a process catalyzed by plants, algae and cyanobacteria, is one of the fundamental processes of life on Earth. It converts sunlight to energy thus sustaining all higher life on Earth. Two large protein complexes, called photosystem I and II From providing living cells with energy, to nitrogen fixation, to the splitting of water molecules, the catalytic activities of metalloenzymes—proteins that contain a metal ion—are vital to life on Earth. A better understanding of the chemistry behind A graduate student in his lab, Manjula Mummadisetti, led this latest study that examined the cellular system responsible for creating oxygen during photosynthesis called Photosystem II. She analyzed two proteins that are critical to creating oxygen and .

Geobiologists writing in PNAS say they have found evidence of a precursor photosystem involving manganese that predates cyanobacteria, the first group of organisms to release oxygen into the environment via photosynthesis. The findings support the idea SEE ALSO: Scientists Use Cobalt-Based Catalysts to Replicate Photosynthesis Photosystem II is the only known biological system able to harness sunlight for the oxidation of water into molecular oxygen. “An effective method of solar-based water-splitting Berkeley, CA (Scicasts) – From providing living cells with energy, to nitrogen fixation, to the splitting of water molecules, the catalytic activities of metalloenzymes – proteins that contain a metal ion – are vital to life on Earth. A better (Nanowerk News) Plants, algae, and cyanobacteria (blue-green algae) are masters of everything to do with solar energy because they are able to almost completely transform captured sunlight into chemical energy. This is in part because the electrons set .

• photosystem Photosystem 1 and 2 Structure 226 x 400 · 34 kB · jpeg
• photosystem 形成ATP及NADPH，供給暗反應合成有機養份之所需。 400 x 258 · 31 kB · jpeg
• photosystem Photosynthesis Images 413 x 312 · 33 kB · gif
• photosystem say a photon of light hits the reaction center in photosystem ii 320 x 249 · 70 kB · png
• photosystem scheme of photosynthesis 400 x 260 · 94 kB · png
• photosystem Plant Cell Chloroplast Structure 400 x 211 · 29 kB · jpeg
• photosystem Photosynthesis Spectrum 400 x 297 · 35 kB · jpeg
• photosystem Sunday, July 08, 2007 400 x 329 · 50 kB · jpeg
• photosystem TITLE_IMG9 IMG_RES9
• photosystem TITLE_IMG10 IMG_RES10

photosystem Image Gallery

photosystem Photosystem 1 and 2 Structure | File Size: 226 x 400 · 34 kB · jpeg Download

photosystem 形成ATP及NADPH，供給暗反應合成有機養份之所需。 | File Size: 400 x 258 · 31 kB · jpeg Download

photosystem Photosynthesis Images | File Size: 413 x 312 · 33 kB · gif Download

photosystem say a photon of light hits the reaction center in photosystem ii | File Size: 320 x 249 · 70 kB · png Download

photosystem scheme of photosynthesis | File Size: 400 x 260 · 94 kB · png Download

photosystem Plant Cell Chloroplast Structure | File Size: 400 x 211 · 29 kB · jpeg Download

photosystem Photosynthesis Spectrum | File Size: 400 x 297 · 35 kB · jpeg Download

photosystem Sunday, July 08, 2007 | File Size: 400 x 329 · 50 kB · jpeg Download

photosystem TITLE_IMG9 | File Size: IMG_SIZE9 Download

photosystem TITLE_IMG10 | File Size: IMG_SIZE10 Download