Before revision:  Here we demonstrate, using mass spectrometry (MS)  and fluorescence resonance energy transfer (FRET), that parallel-stranded structures consisting of up to 20 G-Ag(I)-G or 30 C-Ag(I)-C contiguous base pairs are formed when natural DNA sequences are mixed with silver cations in aqueous solution.
After revision:  Here we demonstrate, using mass spectrometry (MS) , ion mobility spectrometry (IMS) and fluorescence resonance energy transfer (FRET), that parallel-stranded structures consisting of up to 20 G-Ag(I)-G or 30 C-Ag(I)-C contiguous base pairs are formed when natural DNA sequences are mixed with silver cations in aqueous solution.