Network visualization of terpene nucleosides and CID-MS fragments.

<p>Terpene nucleoside precursors and their fragment ions (observed <i>m/z</i>) after CID-MS were compared to 1-TbAd and the four diagnostic fragments characteristic of CID-MS (calculated <i>m/z</i>) in a pairwise analysis. Only fragments diagnostic of TbAd or modifications of those fragments are shown, with all precursors and fragments within 15 ppm of their calculated mass. Node shapes indicate the precursor and fragment ions; colors indicate adenine, adenosine, tuberculosinyl terpene or tuberculosinyladenine fragments or modifications of those moieties. Vertices connecting precursors and fragments show the presence of shared or unique fragments.</p> <p>(PDF)</p>