VCAC: Cellular Processes: Photosynthesis: Advanced Look: Cytochrome b6-f

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

Flythrough Tour

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CELLULAR PROCESSES

Atp Synthase

Electron Transport Chain

Protein Trafficking

Protein Modification

Protein Recycling

Constitutive Secretion

Regulated Secretion

Mitochondrial Protein Transport

Photosynthesis

Photosystem II

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MOLECULAR PROCESSES

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HOME > PHOTOSYNTHESIS > ADVANCED LOOK > 1.) PHOTO-II > 2.) CYTOCHROME B6-F

Photosynthesis: 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).

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