Structural investigation of complexes formed by DNA+CTAB and DNA+DDAB and Designing a method to increase salt ions between DNA and the Surfactant rods.

Document Type : Research Paper




The internal structure of DNA-CTAB and DNA-DDAB is investigated by a Small Angel X- ray Scattering
(SAXS) instrument. Hexagonal packing of DNA was observed for DNA complex with CTAB, and for DDAB
complex is observed lamellar structure. Variations in the internal spacing and degree of long-range ordering are
dependent on both surfactant type and concentrations of added salt. When we increased the amount of salt into
our complex we observed that the d spacing (d= 211/q) are increased.