A. C. Hopkinson

Piatkivskyi, A., Osburn, S., Jaderberg, K., Grzetic, J., Steill, J. D., Oomens, J., … Ryzhov, V. (2013). Structure and Reactivity of the Distonic and Aromatic Radical Cations of Tryptophan. Journal of the American Society for Mass Spectrometry, 24(4), 513-523. https://doi.org/10.1007/s13361-013-0594-0 (Original work published 2025)

Piatkivskyi, A., Osburn, S., Jaderberg, K., Grzetic, J., Steill, J. D., Oomens, J., … Ryzhov, V. (2013). Erratum to: Structure and Reactivity of the Distonic and Aromatic Radical Cations of Tryptophan (vol 24, pg 1620, 2013). Journal of the American Society for Mass Spectrometry, 24(10), 1620-1620. https://doi.org/10.1007/s13361-013-0708-8 (Original work published 2025)

Shek, P. Y. I., Lau, J. K. C., Zhao, J. F., Grzetic, J., Verkerk, U. H., Oomens, J., … Siu, K. W. M. (2012). Fragmentations of protonated cyclic-glycylglycine and cyclic-alanylalanine. International Journal of Mass Spectrometry, 316, 199-205. https://doi.org/10.1016/j.ijms.2012.02.011 (Original work published 2025)

Verkerk, U. H., Zhao, J. F., Saminathan, I. S., Lau, J. K. C., Oomens, J., Hopkinson, A. C., & Siu, K. W. M. (2012). Infrared Multiple-Photon Dissociation Spectroscopy of Tripositive Ions: Lanthanum-Tryptophan Complexes. Inorganic Chemistry, 51(8), 4707-4710. https://doi.org/10.1021/ic2026973 (Original work published 2025)

Verkerk, U. H., Zhao, J. F., van Stipdonk, M. J., Bythell, B. J., Oomens, J., Hopkinson, A. C., & Siu, K. M. (2011). Structure of the [M+H-H2O](+) Ion from Tetraglycine: A Revisit by Means of Density Functional Theory and Isotope Labeling. Journal of Physical Chemistry A, 115(24), 6683-6687. https://doi.org/10.1021/jp202820h (Original work published 2025)

Verkerk, U. H., Siu, C. K., Steill, J. D., Aribi, E., Zhao, J. F., Rodriquez, C. F., … Siu, K. W. M. (2010). a(2) Ion Derived from Triglycine: An N-1-Protonated 4-Imidazolidinone. Journal of Physical Chemistry Letters, 1, 868-872. Retrieved from <Go to ISI>://000277041000013 (Original work published 2025)

Dunbar, R. C., Hopkinson, A. C., Oomens, J., Siu, C. K., Siu, K. W. M., Steill, J. D., … Zhao, J. F. (2009). Conformation Switching in Gas-Phase Complexes of Histidine with Alkaline Earth Ions. Journal of Physical Chemistry B, 113, 10403-10408. Retrieved from <Go to ISI>://000268231000048 (Original work published 2025)

Steill, J., Zhao, J. F., Siu, C. K., . Y. Ke, Y., Verkerk, U. H., Oomens, J., … Siu, K. W. M. (2008). Structure of the Observable Histidine Radical Cation in the Gas Phase: A Captodative alpha-Radical Ion. Angewandte Chemie-International Edition, 47, 9666-9668. Retrieved from <Go to ISI>://000261727400012