CONFORMATION SPACE

Two-dimensional IM–MS plots of conformation space illustrating three examples where conformation space is populated with signals significantly
deviating (positively or negatively) from the apparent peptide ATD–m/z trendline: (a) helical vs random coil structures, (b) phosphorylated peptide, (c) peptide-small molecule complex .
“Ion Mobility-Mass Spectrometry: A New Paradigm for Proteomics,” John A. McLean, Brandon T. Ruotolo, Kent J. Gillig, and David H. Russell, Int. J. Mass Soc., 2005, 240, 301-315.

CRUDE OIL
Two-dimensional IM-MS plot for the CnHn series of Calvert crude oils for n = 19, 20, 21, 22, 23, and 24. (Bottom) Two-dimensional IM-MS and three-dimensional IM-MS plots of the 280 < m/z < 350 and 340 < m/z < 344 regions of the Calvert, Duri, and San Andro crude oils. Note the unique compositional pattern in the two-dimensional IM-MS plots and the separation in ATD for species of the same nominal mass in the three-dimensional IM-MS plots.
“Ion Mobility-Mass Spectrometry: A Tool for Characterizing the Petroleome,” Christopher Becker, Francisco Fernandez-Lima, David H. Russell, 2009, Spectroscopy, 24, 38-42.