Skip to main content
. 2005 Nov 18;90(4):1175–1190. doi: 10.1529/biophysj.105.070904

FIGURE 4.

FIGURE 4

The temperature-dependence of the electrostatic part of the free energy. (a,b) The electrostatic free energy Inline graphic of dsDNA (solid lines) and ssDNA (dashed lines) as functions of temperature: (a) for a 10-bp dsDNA and the respective ssDNA at 3 mM, 10 mM, 30 mM, 69 mM, 220 mM, and 1 M NaCl (from the top to bottom); (b) for a 9-bp dsDNA and the respective ssDNA at 0.1, 0.3, 1, 10, and 100 mM MgCl2 (from the top to bottom). (c,d) The temperature-dependence of electrostatic contribution Inline graphic to folding free energy for dsDNA helix formation in (c) NaCl and (d) MgCl2 solutions. (Dotted lines) Poisson-Boltzmann theory; (solid lines) the TBI theory. (c) Sequence ATCGTCTGGA at 3 mM, 10 mM, 30 mM, 69 mM, 220 mM, and 1 M NaCl (from the top to bottom); (d) sequence GCCAGTTAA at 0.1, 0.3, 1, 10, and 100 mM MgCl2 (from the top to bottom).