Figure 9.

(a) CD spectra of bDNA US2 alone (blue), US2 with 2.5 and 10 mM of LaCl₃ (red and green, respectively), 2.5 and 15 mM of EDTA added to US2-La³⁺ complex (violet and cyan, respectively). (b) CD spectra of bDNA US2 alone (blue), after interaction with EDTA (red), 2.5, 5 and 10 mM of LaCl₃ to the US2-EDTA solution (green, violet and cyan, respectively). (c) CD spectra of bDNA US2 alone (blue), US2 with 2.5 and 10 mM of LaCl₃ (red and green, respectively), 120 μM of EtBr added to US2-La³⁺ complex (violet). (d) CD spectra of bDNA US2 alone (blue), after interaction with EtBr (red), 5 and 10 mM of LaCl₃ to US2-EtBr complex (green and violet, respectively). EtBr alone is shown in cyan.