Active Transport

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Active transport is the process in which certain molecules or ions are pumped across a membrane via a channel protein, against their concentration gradient[1]. For this mechanism to work, and source of free energy must be supplied so the solute can move from an area of low concentration to an area of high concentration[2]. This source of energy can either come from the hydrolysis of an ATP molecule or an existing ion gradient[3].

References

  1. Alberts, B et.al. (2008). Molecular Biology of the Cell. 5th Edition. New York: Garland Science, Taylor & Francis Group, LLC. Page 654.
  2. Berg, J et.al. (2012). Biochemistry. 7th Edition. United States of America: W.H. Freeman and Company. Page 385.
  3. Alberts, B et.al. (2008). Molecular Biology of the Cell. 5th Edition. New York: Garland Science, Taylor & Francis Group, LLC. Page 654.
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