Collisionally activated dissociation of field desorbed protonated dinucleoside phosphates

The collisionally activated dissociation (CAD) of six protonated dinucleoside monophosphates produced by field desorption has been studied by linked scanning (B/E=constant). Complete spectra with detailed structure information have been obtained despite the small ion currents and other technical problems. It is possible to distinguish isomeric sequences in both ribo- and deoxyribo-nucleotides series.