Vesicle

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A vesicle is a membrane-bound sac found in many cells, which is formed when part of a compartment membrane buds off [1]. Vesicles are vital for the taking up, release and transport of molecules within and between cells. Many cells take up molecules via receptor-mediated endocytosis, the process by which binding of a particular protein or other complex causes invagination of the membrane, which eventually breaks off forming a vesicle containing the desired protein or substance [2]. The opposite of this process is exocytosis, whereby a vesicle fuses to a membrane, releasing its contents[3].

Also see vesicles.

References

  1. Alberts et al (2008), Molecular Biology of the Cell, 5th edition, New York: Garland Science, pg 701
  2. Berg et al (2006), Biochemistry, 6th edition, New York: W. H. Freeman, pg 346
  3. Berg et al (2006), Biochemistry, 6th edition, New York: W. H. Freeman, pg 346
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