Figure 4
From: Specific effects of antitumor active norspermidine on the structure and function of DNA
1H NMR spectra for methylene groups of SPD and NSPD at different concentrations of CT DNA. The polyamine concentration was fixed at 0.1 mM. (a) δ = 3.20–3.00 ppm, (b) 2.15–2.00 ppm, and (c) 1.85–1.70 ppm.
