Stay positive! Dissociation of a lanthanum complex of triglycine generates a novel diprotonated iminium ion (see picture; gray C, white H, light blue La, dark blue N, red O), which undergoes rich fragmentations. This class of peptide fragment ions provides a system to model multiple charge effects and is potentially useful in peptide sequencing.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.