Proton pump

Proton pump
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Proton pump
A proton pump is an integral membrane protein that is capable of moving protons across the membrane of a cell, mitochondrion, or other subcellular compartment, ...

proton pump
integral membrane proteins that transport protons across a membrane against a concentration gradient. This transport is driven by hydrolysis of aTP by hydrogen-transporting ATP synthase.

proton pump
An active transport mechanism in cell membranes that consumes ATP to force hydrogen ions out of a cell and, in the process, generates a membrane potential.
protonephridium ...

a proton pump (an H+-ATPase) in the plasma membrane of the guard cell.
ATP, generated by the light reactions of photosynthesis, drives the pump.
As protons (H+) are pumped out of the cell, its interior becomes increasingly negative.

See also: Trans, Membrane, Protein, Bacteria, Cell