Crystal Structure Of Photosystem I: A Photosynthetic Reaction Center and Core Antenna System From Cyanobacteria: Reenergizing Those Electrons!

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Protein Backbone

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Intrastrand Hydrogen Bonds

Disulfide Bridges

Molecule Properties

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Charged Regions (Green)

Electrostatic Surface Potential (Red indicates negative potential, blue indicates positive potential, some load time)

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Molecule Interactions

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Photosystem I Binding Water Ligands (Solvent Accessible Area)

Photosystem I utilizes sulfur clusters as electrons are literally passed through Photosystem I in bioenergetic chemical reactions. As can be seen, several sulfur clusters are present throughout Photosystem I.

Photosystem I Sulfur Clusters

Zoomed-In View of Photosystem I Sulfur Clusters

In cyanobacteria, phycocyanin is a blue accessory pigment attached to photosynthetic membranes, utilized in photosynthesis. It accounts for up to 20% of proteins in cyanobacteria.

Photosystem I Phycocyanin Sites (Entire Molecule Visualization)

Photosystem I Phycocyanin Sites (Protein Backbone Visualization)

Zoomed-In View of Photosystem I Phycocyanin Sites

Tom Johnson and Cathy Watson put their hearts and souls entirely into this effort.