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Ethidium bromide fluorescence quenching in (a) P(DMAEMA-co-OEGMA)-1/DNA of 113 bp and 2000 bp and (b) P(QDMAEMA-co-OEGMA)-1/DNA of 113 bp and 2000 bp polyplexes. Indicative fluorescence spectra of the intercalated ethidium bromide for polyplexes with DNA of 2000 bp are also included in Figure 5a,b.
