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==Overview==

All higher organisms on Earth receive energy directly or indirectly from, oxygenic photosynthesis performed by plants, green algae and, cyanobacteria. Photosystem I (PSI) is a supercomplex of a reaction centre, and light-harvesting complexes. It generates the most negative redox, potential in nature, and thus largely determines the global amount of, enthalpy in living systems. We report the structure of plant PSI at 3.4 A, resolution, revealing 17 protein subunits. PsaN was identified in the, luminal side of the supercomplex, and most of the amino acids in the, reaction centre were traced. The crystal structure of PSI provides a, picture at near atomic detail of 11 out of 12 protein subunits of the, reaction centre. At this level, 168 chlorophylls (65 assigned with, orientations for Q(x) and Q(y) transition dipole moments), 2, phylloquinones, 3 Fe(4)S(4) clusters and 5 carotenoids are described. This, structural information extends the understanding of the most efficient, nano-photochemical machine in nature.

All higher organisms on Earth receive energy directly or indirectly from oxygenic photosynthesis performed by plants, green algae and cyanobacteria. Photosystem I (PSI) is a supercomplex of a reaction centre and light-harvesting complexes. It generates the most negative redox potential in nature, and thus largely determines the global amount of enthalpy in living systems. We report the structure of plant PSI at 3.4 A resolution, revealing 17 protein subunits. PsaN was identified in the luminal side of the supercomplex, and most of the amino acids in the reaction centre were traced. The crystal structure of PSI provides a picture at near atomic detail of 11 out of 12 protein subunits of the reaction centre. At this level, 168 chlorophylls (65 assigned with orientations for Q(x) and Q(y) transition dipole moments), 2 phylloquinones, 3 Fe(4)S(4) clusters and 5 carotenoids are described. This structural information extends the understanding of the most efficient nano-photochemical machine in nature.

==About this Structure==

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[[Category: photosynthesis]]

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@@ Line 4: / Line 4: @@
 ==Overview==
-All higher organisms on Earth receive energy directly or indirectly from, oxygenic photosynthesis performed by plants, green algae and, cyanobacteria. Photosystem I (PSI) is a supercomplex of a reaction centre, and light-harvesting complexes. It generates the most negative redox, potential in nature, and thus largely determines the global amount of, enthalpy in living systems. We report the structure of plant PSI at 3.4 A, resolution, revealing 17 protein subunits. PsaN was identified in the, luminal side of the supercomplex, and most of the amino acids in the, reaction centre were traced. The crystal structure of PSI provides a, picture at near atomic detail of 11 out of 12 protein subunits of the, reaction centre. At this level, 168 chlorophylls (65 assigned with, orientations for Q(x) and Q(y) transition dipole moments), 2, phylloquinones, 3 Fe(4)S(4) clusters and 5 carotenoids are described. This, structural information extends the understanding of the most efficient, nano-photochemical machine in nature.
+All higher organisms on Earth receive energy directly or indirectly from oxygenic photosynthesis performed by plants, green algae and cyanobacteria. Photosystem I (PSI) is a supercomplex of a reaction centre and light-harvesting complexes. It generates the most negative redox potential in nature, and thus largely determines the global amount of enthalpy in living systems. We report the structure of plant PSI at 3.4 A resolution, revealing 17 protein subunits. PsaN was identified in the luminal side of the supercomplex, and most of the amino acids in the reaction centre were traced. The crystal structure of PSI provides a picture at near atomic detail of 11 out of 12 protein subunits of the reaction centre. At this level, 168 chlorophylls (65 assigned with orientations for Q(x) and Q(y) transition dipole moments), 2 phylloquinones, 3 Fe(4)S(4) clusters and 5 carotenoids are described. This structural information extends the understanding of the most efficient nano-photochemical machine in nature.
 ==About this Structure==
@@ Line 26: / Line 26: @@
 [[Category: photosynthesis]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jan 23 12:02:38 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:13:04 2008''