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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Curr Opin Colloid Interface Sci. 2011 Dec;16(6):551–556. doi: 10.1016/j.cocis.2011.04.010

Figure 5.

Figure 5

The addition of 2 M NaCl has a much larger impact on neutral and nonpolar HPC-HPC forces than on DNA-DNA interactions. In both cases, the samples were initially in 10 mM TrisCl (pH 7.5), 1 mM EDTA. Salt is acting on HPC through exclusion. The difference in salt concentration between the HPC phase and the bulk solution results in an excess osmotic pressure acting on the condensed phase.