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1. Rearrangement of Proline Complexes with Zn 2+ : An Infrared Multiple Photon Dissociation and Theoretical Investigation.

2. 5-Halogenation of Uridine Suppresses Protonation-Induced Tautomerization and Enhances Glycosidic Bond Stability of Protonated Uridine: Investigations via IRMPD Action Spectroscopy, ER-CID Experiments, and Theoretical Calculations.

3. Unidirectional Double- and Triple-Hydrogen Rearrangement Reactions Probed by Infrared Ion Spectroscopy.

4. IRMPD Spectroscopy of [PC (4:0/4:0) + M] + (M = H, Na, K) and Corresponding CID Fragment Ions.

5. Influence of a Hydroxyl Group on the Deamidation and Dehydration Reactions of Protonated Asparagine-Serine Investigated by Combined Spectroscopic, Guided Ion Beam, and Theoretical Approaches.

6. Water Loss from Protonated XxxSer and XxxThr Dipeptides Gives Oxazoline-Not Oxazolone-Product Ions.

7. A Combined Infrared Ion Spectroscopy and Computational Chemistry Study of Hydroxyproline Isomers.

8. Impact of Sodium Cationization on Gas-Phase Conformations of DNA and RNA Cytidine Mononucleotides.

9. Spectroscopic Evidence for Lactam Formation in Terminal Ornithine b 2 + and b 3 + Fragment Ions.

10. Structures and Relative Glycosidic Bond Stabilities of Protonated 2'-Fluoro-Substituted Purine Nucleosides.

11. Impact of the 2'- and 3'-Sugar Hydroxyl Moieties on Gas-Phase Nucleoside Structure.

12. Modified Quadrupole Ion Trap Mass Spectrometer for Infrared Ion Spectroscopy: Application to Protonated Thiated Uridines.

13. Structural Investigation of the Hormone Melatonin and Its Alkali and Alkaline Earth Metal Complexes in the Gas Phase.

14. Influence of Transition Metal Cationization versus Sodium Cationization and Protonation on the Gas-Phase Tautomeric Conformations and Stability of Uracil: Application to [Ura+Cu] + and [Ura+Ag]<sup/>.

15. IRMPD Action Spectroscopy, ER-CID Experiments, and Theoretical Studies of Sodium Cationized Thymidine and 5-Methyluridine: Kinetic Trapping During the ESI Desolvation Process Preserves the Solution Structure of [Thd+Na]<sup/>.

16. N3 and O2 Protonated Conformers of the Cytosine Mononucleotides Coexist in the Gas Phase.

17. Infrared Multiple-Photon Dissociation Action Spectroscopy of the b 2 + Ion from PPG: Evidence of Third Residue Affecting b 2 + Fragment Structure.

18. Deamidation Reactions of Asparagine- and Glutamine-Containing Dipeptides Investigated by Ion Spectroscopy.

19. Photoleucine Survives Backbone Cleavage by Electron Transfer Dissociation. A Near-UV Photodissociation and Infrared Multiphoton Dissociation Action Spectroscopy Study.

20. 2,4-Dihydroxy and O2 Protonated Tautomers of dThd and Thd Coexist in the Gas Phase: Methylation Alters Protonation Preferences versus dUrd and Urd.

21. Structures of a(n)* ions derived from protonated pentaglycine and pentaalanine: results from IRMPD spectroscopy and DFT calculations.

22. IRMPD action spectroscopy of alkali metal cation-cytosine complexes: effects of alkali metal cation size on gas phase conformation.

23. Spectroscopic identification of cyclic imide b2-ions from peptides containing Gln and Asn residues.

24. Structure and reactivity of the distonic and aromatic radical cations of tryptophan.

25. Protonation preferentially stabilizes minor tautomers of the halouracils: IRMPD action spectroscopy and theoretical studies.

26. S-to-αC radical migration in the radical cations of Gly-Cys and Cys-Gly.

27. Disfavoring macrocycle b fragments by constraining torsional freedom: the "twisted" case of QWFGLM b6.

28. Structure elucidation of the diagnostic product ion at m/z 97 derived from androst-4-en-3-one-based steroids by ESI-CID and IRMPD spectroscopy.

29. Spectroscopic evidence for an oxazolone structure in anionic b-type peptide fragments.

30. Structure and reactivity of the N-acetyl-cysteine radical cation and anion: does radical migration occur?

31. Infrared multiple photon dissociation action spectroscopy and theoretical studies of triethyl phosphate complexes: effects of protonation and sodium cationization on structure.

32. Infrared multiple photon dissociation action spectroscopy and theoretical studies of diethyl phosphate complexes: effects of protonation and sodium cationization on structure.

33. Oxazolone versus macrocycle structures for Leu-enkephalin b2-b4: insights from infrared multiple-photon dissociation spectroscopy and gas-phase hydrogen/deuterium exchange.

34. The structure of deprotonated tri-alanine and its a3- fragment anion by IR spectroscopy.

35. Variable denticity in carboxylate binding to the uranyl coordination complexes.

36. Spectroscopic evidence for mobilization of amide position protons during CID of model peptide ions.

37. IRMPD spectroscopy of anionic group II metal nitrate cluster ions.

38. Spectroscopic evidence for an oxazolone structure of the b(2) fragment ion from protonated tri-alanine.

39. Observation of zwitterion formation in the gas-phase H/D-exchange with CH(3)OD: solution-phase structures in the gas phase.

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