Example of primary active transport, where energy from hydrolysis of ATP is directly coupled to the movement of a specific substance across a membrane independent of any other species.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-zh.svg" title="File:Scheme sodium-potassium pump-zh.svg">Scheme_sodium-potassium_pump-zh.svg</a>: *<a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-en.svg" title="File:Scheme sodium-potassium pump-en.svg">Scheme_sodium-potassium_pump-en.svg</a>: <a href="//commons.wikimedia.org/wiki/User:LadyofHats" title="User:LadyofHats">LadyofHats</a> Mariana Ruiz Villarreal</li>
<li>derivative work: <a href="//commons.wikimedia.org/w/index.php?title=User:Shakiestone&amp;action=edit&amp;redlink=1" class="new" title="User:Shakiestone (page does not exist)">Shakiestone</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Shakiestone" title="User talk:Shakiestone"><span class="signature-talk">talk</span></a>)</li>
<li><a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-en.svg" title="File:Scheme sodium-potassium pump-en.svg">Scheme_sodium-potassium_pump-en.svg</a>: <a href="//commons.wikimedia.org/wiki/User:LadyofHats" title="User:LadyofHats">LadyofHats</a> Mariana Ruiz Villarreal</li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Derekleungtszhei" title="User:Derekleungtszhei">Derekleungtszhei</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Derekleungtszhei" title="User talk:Derekleungtszhei"><span class="signature-talk">talk</span></a>)</li></ul>
2011-11-28 01:07
<ul><li><a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-zh.svg" title="File:Scheme sodium-potassium pump-zh.svg">Scheme_sodium-potassium_pump-zh.svg</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-en.svg" title="File:Scheme sodium-potassium pump-en.svg">Scheme_sodium-potassium_pump-en.svg</a></li></ul>