Abstract
Pteridine-polyamine conjugates, such as 2-polyamine (1,3-diaminopropane and spermine) substituted 6,7-dimethyl-3H-pteridine-4-one, induce a folding transition of a giant DNA molecule more effectively than the corresponding polyamines. However, since neither a DNA high-temperature shift of denaturation (Tm) curve nor distortion of the UV/fluorescence spectra is observed in a mixture of these compounds with DNA, they do not interact with the DNA duplex strongly.
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