FIGURE 14.

Phase diagrams of DNA-salt mixtures for the YS model as a function of the DNA packing fraction πρa² and salt concentration n_s in the aggregate: (a) θ = 0.9, f₃ = 1; the lattice here is HEX. (b) θ = 0.7, f₁ = 0.3, and f₂ = 0.7; (c) θ = 0.9, f₁ = 0.3, and f₂ = 0.7. Dashed lines denote second-order magnetic transitions, solid lines first-order ones. The geometrical transitions between different lattices in b and c are second order; the straight lines are tielines between coexisting phases.