On the Question of Salt Bridges of Cationized Amino Acids in the Gas Phase: Glycine and Arginine
Thomas Wyttenbach, Matthias Witt, and Michael T. Bowers
Int. J. Mass Spectrom. 1999, 182/183, 243-252

This article, as published in the International Journal of Mass Spectrometry, contains an error. Structure V in Figure 4 has one too many protons. The corrected figure is shown below.