Sobel E S, Harpst J A
Department of Biochemistry, Case Western Reserve University, Cleveland, Ohio 44106-4935.
Biopolymers. 1991 Nov;31(13):1559-64. doi: 10.1002/bip.360311311.
Total intensity, Rayleigh light scattering has been used to measure the rms radius, second virial coefficient, persistence length, and excluded volume of homogeneous T7 bacteriophage DNA as a function of Na+ concentration (0.005 to 3.0 M). All parameters decrease sharply as [Na+] increases, and tend to level off at high Na+. The variation of persistence length with [Na+] is consistent with predictions from counterion condensation theory.
