Figure 2.
(a) Effective interaction potential between two DNA tetramers, excluding the sticky ends, as a function of the distance r between the tetramers’ centers of mass for fixed temperature T = 20 °C and different salt concentrations (main panel) and for fixed salt concentration S = 0.05 M and different temperatures (inset). (b) Second virial coefficient B2 for DNA tetramers (f = 4) as a function of the inverse of the salt concentration for different temperatures (main panel) and as a function of the temperature for different salt concentrations (inset). The second virial coefficient is evaluated according to eq 11.