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.

Subject Areas : Journal of Physical & Theoretical Chemistry

E. Moniri ¹ , F. Gharib ² , M. Monajjemi ³ , K. Zare ⁴

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Received: 2015-05-09 Accepted : 2015-05-09 Published : 2005-11-01

Abstract :

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 DDABcomplex is observed lamellar structure. Variations in the internal spacing and degree of long-range ordering aredependent on both surfactant type and concentrations of added salt. When we increased the amount of salt intoour complex we observed that the d spacing (d= 211/q) are increased.

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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.