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. Author manuscript; available in PMC: 2010 Jun 3.
Published in final edited form as: Chem Rev. 2009 Mar 11;109(3):839–860. doi: 10.1021/cr800373w

Figure 13.

Figure 13

The depletion effect. (a) An osmotic pressure is exerted on two particles (proteins) immersed in a macromolecular solution, when their separation does not allow the solute macromolecules to penetrate the volume between them. (b) This entropic effect is minimal when the two particles are in contact (e.g. when two proteins associate).