Navigation Links
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, thereby creating a difference or gradient in both pH and electrical charge (ignoring differences in buffer capacity) and tending to establish an electrochemical potential.

In bacteria, mitochondria and other ATP-producing organelles, reducing equivalents provided by electron transfer or photosynthesis power this translocation of protons. For example, the translocation of protons by cytochrome c oxidase is powered by reducing equivalents provided by reduced cytochrome c. In the plasma membrane proton ATPase and in the ATPase proton pumps of other cellular membranes, ATP itself powers this transport.

The F0F1 ATP synthase of mitochondria and the CF1 ATP synthetase of chloroplasts, in contrast, usually conduct protons from high to low concentration across the membrane while drawing energy from this flow to synthesize ATP.

Bacteriorhodopsin is a photosynthetic pigment used by archaea, most notably halobacteria.

See also:


'"/>


(Date:12/5/2014)... MOUNTAIN VIEW, Calif. , Dec. 4, 2014 ... and safety has boosted investments in new testing ... products has also given rise to a range ... driven by the requirements of Generation Y, which ... digital technologies. As a result, product development strategies ...
(Date:11/21/2014)... According to a new market research report ... Control, Intrusion Detection, Parking Management, Under Vehicle Inspection), End ... - Global Forecasts to 2020", published by MarketsandMarkets, The ... $25 Billion in 2014 and is expected to reach ... 8.69%. Browse 116 market data Tables and ...
(Date:11/18/2014)... -- The Secure Identity & Biometrics Association (SIBA) and ... formation of The Airport Entry and Exit Working ... Biometric Entry and Exit Solutions Framework for Airports ... BORDERPOL, the international non-profit organization that works directly ... border security, traveler and migration systems. ...
Breaking Biology News(10 mins):Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3
... Disorders and Stroke (NINDS), a component of the National Institutes ... the Morris K. Udall Centers of Excellence in Parkinson,s Disease ... totaling more than $16 million for Emory University in Atlanta ... NINDS Director Story Landis, Ph.D., announced the ...
... the future" story, scientists today reported that the sustainable, ... ago is re-emerging as a "green" alternative to wood ... the American Chemical Society, they described development of new ... and tofu and could mean a new generation of ...
... increase of up to 4.2 C and the end ... targets are not revised in the Copenhagen Accord, the international ... change conference. Just ahead of the next ... in Tianjin, China, a new report published today, Wednesday, 29 ...
Cached Biology News:NINDS awards new Udall Centers for Parkinson's Disease Research 2NINDS awards new Udall Centers for Parkinson's Disease Research 3Climate accord loopholes could spell 4.2-degree rise in temperature and end of coral reefs by 2100 2
Other biology definitionOther Tags