[B-A transition of DNA in aqueous solutions of nonelectrolytes].
Circular dichroism spectra of DNA in ternary water-nonelectrolyte solutions (water--ethanol--isopropanol and water--ethanol--dioxane) show that the decrease in water content at various nonelectrolyte ratios leads to the transition of DNA from B- to A-form. Water activity values in B-A transition region were calculated. The transition takes place within the range of water activity and DNA conformations have been plotted on triangular diagrams.
D000818:Animals; D002942:Circular Dichroism; D004247:DNA; D007700:Kinetics; D008433:Mathematics; D009690:Nucleic Acid Conformation; D012996:Solutions
D012996:Solutions; D004247:DNA
B-A-perekhod DNK v vodnykh rastvorakh neélektrolitov.