In cotransport - In cotransport a membrane protein couples...

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In cotransport, a membrane protein couples the transport of two solutes. A single ATP-powered pump that transports one solute can indirectly drive the active  transport of several other solutes in a mechanism called  cotransport. As the solute that has been actively transported diffuses back passively through a transport  protein, its movement can be coupled with the active transport of another substance against  its concentration gradient. Plants commonly use the gradient of hydrogen ions generated by proton pumps to drive the  active transport of amino acids, sugars, and other nutrients into the cell. One specific transport protein couples the diffusion of protons out of the cell and the  transport of sucrose into the cell. Plants use the mechanism of sucrose-proton cotransport to  load sucrose into specialized cells in the veins of leaves for distribution to  nonphotosynthetic organs such as roots.
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