Credit: FRANCIS LEROY & JANA HERMANOVA, BIOCOSMOS/SCIENCE PHOTO LIBRARY

Caption: Animation showing the enzyme ATP synthase producing ATP (adenosine triphosphate), the carrier of metabolic energy in cells. ATP synthase is an enzyme found in the inner membrane (beige) of mitochondria. It projects from the membrane into the mitochondrial matrix, which is enclosed by the membrane. The membrane-bound part (called Fo) comprises a proton pump (grey tube, right) connected to a rotating portion (ridged tube). As protons (blue balls) pass through the membrane, they cause the protein to rotate, a motion which is transmitted to the matrix part of the enzyme (called F1) by the blue gamma subunit. This rotates a hexagonal array of alternating three alpha (yellow) and beta (orange) subunits. The alpha and beta subunits have three states. The first is open and admits ADP (adenosine diphosphate) and organic phosphate (Pi), which are bound after a third of a turn, then another third of a turn forces the ADP and Pi together, forming ATP. The final third of a turn returns the state to open, releasing the ATP and accepting more ADP and Pi. This is shown by three protons passing through the channel for every molecule of ATP made.

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Keywords: active pump, active transport, adenosine diphosphate, adenosine triphosphate, adp, animated, animation, atp, biochemical, biochemistry, bioenergetics, biological, biology, cell, cellular, chemical energy, coenzyme, concentration gradient, diagram, diagrammatic, educational, electrochemical, energy, hydrogen ion, hydrogen ions, inorganic phosphate, integral membrane protein, matrix, membrane, metabolic, mitochondria, mitochondrial, potential difference, proton, proton pump, protons, pumping, rotating, rotation, transmembrane

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ATP synthase

K003/3582 Rights Managed

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Duration: 00:00:23.2

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 244.4M

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Capture format: QuickTime Animation

Codec: Photo - JPEG

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