Questions? Comments? Please contact Dr. Phillip McClean or Christina Johnson.

OVERVIEW
Flythrough Tour
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MOLECULAR PROCESSES
Transcription
Regulated Transcription
mRNA Processing
mRNA Splicing
Translation
Lac Operon
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CELLULAR PROCESSES
Protein Trafficking
Protein Modification
Protein Recycling
Insulin Signaling
Constitutive Secretion
Regulated Secretion
Mitochondrial Protein Transport
Mitosis
Meiosis
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CELLULAR ENERGY CONVERSION
Atp Synthase (Gradients)
Electron Transport Chain
Photosynthesis (Light Reaction)
Photosystem II
Glycolysis (Overview)
Glycolysis (Reactions)
Citric Acid Cycle (Overview)
Citric Acid Cycle (Reactions)
Energy Consumption
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HOME > PHOTOSYNTHESIS (LIGHT) > ADVANCED > 1.) PHOTO-II > 2.) CYTOCHROME B6-F
Photosynthesis (Light): Advanced Look --> 2.) Cytochrome b6-f

Cytochrome b6-f is the second major protein complex in the photosynthetic electron transport chain. Clicking on each of the thumbnail images will bring up a larger, labeled version of the described scene.

To see the Flash movie for the following sequence of images, click here.

Plastoquinone Qb (magenta) transports two electrons to the second complex in the photosynthetic ETC--Cytochrome b6-f.

When it reaches cytochrome b6-f (yellow), Qb releases the two protons it picked up from the stroma into the lumen space and transfers the two electrons it picked up from photosystem II to the cytochrome complex.

Coupled with the transfer of each electron, is the pumping of another hydrogen ion across the thylakoid membrane into the lumen by the cytochrome complex.

After cytochrome b6-f pumps the additional protons across the membrane, each electron is transferred to plastocyanin, the next mobile carrier (dark blue).

NEXT --> 3.) PHOTOSYSTEM I

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