Extrapolation of relative viscosities for calf-thymus DNA solutions at neutral pH to zero hydrostatic pressure.
Triangles: original solution at 2.43 mg/ml (from Figure 4 curve IX of [3]): ηr ∼ 150. Circles: original solution at 0.12 mg/ml (from Graph 3/2 curve V of [4]): ηr ∼ 2. Squares: solution at 2.43 mg/ml shortly (25 min) after alkaline treatment (from Figure 4 curve V of [3]): ηr ∼ 10.