Coupled Pumps

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Coupled pumps can also be known as secondary active transporters. This is due to the fact that the movement of the first molecule, or the concentration gradient created by the first molecule can be used to drive the active transport of a second different molecule. 

There are two types of coupled pumps:

  1. Symporters - which transport two or more ions together in the same direction across the phospholipid bilayer.
  2. Antiporters - which transport two or more ions in opposite directions across the phospholipid bilayer.

An example of a symport transport mechanism is the co-transport of glucose/Na+.[1]


  1. Alberts, B., Bray, D., Hopkin, K., Johnson, A., Lewis, J., Raff, M., Roberts, K. and Walter, P. (2013). Essential cell biology. 4th ed. New York: Garland Science., pp.370-405.
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