Femtosecond UV photochemistry of the biologically relevant L-cysteine disulfide moiety in aqueous solution investigated by time-resolved X-ray absorption spectroscopy

Miguel Ochmann; Jessica Harich; Rory Ma; Antonia Freibert; Jae Hyuk Lee; Daewoong Nam; Sangsoo Kim; Intae Eom; Minseok Kim; Yujin Kim; Mahusudana Gopannagari; Dae Hye Hong; Tae Kyu Kim; Nils Huse

doi:10.1364/UP.2022.M1A.4

The International Conference on Ultrafast Phenomena (UP) 2022
Technical Digest Series (Optica Publishing Group, 2022),
paper M1A.4
•https://doi.org/10.1364/UP.2022.M1A.4

Femtosecond UV photochemistry of the biologically relevant L-cysteine disulfide moiety in aqueous solution investigated by time-resolved X-ray absorption spectroscopy

Miguel Ochmann, Jessica Harich, Rory Ma, Antonia Freibert, Jae Hyuk Lee, Daewoong Nam, Sangsoo Kim, Intae Eom, Minseok Kim, Yujin Kim, Mahusudana Gopannagari, Dae Hye Hong, Tae Kyu Kim, and Nils Huse

International Conference on Ultrafast Phenomena 2022

Montreal, Quebec Canada
18–22 July 2022
ISBN: 978-1-957171-07-4

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Opening Remarks and Probing Dynamics in Biological Systems (M1A)

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M. Ochmann, J. Harich, R. Ma, A. Freibert, J. H. Lee, D. Nam, S. Kim, I. Eom, M. Kim, Y. Kim, M. Gopannagari, D. H. Hong, T. K. Kim, and N. Huse, "Femtosecond UV photochemistry of the biologically relevant L-cysteine disulfide moiety in aqueous solution investigated by time-resolved X-ray absorption spectroscopy," in The International Conference on Ultrafast Phenomena (UP) 2022, F. Légaré, T. Tahara, J. Biegert, T. Brixner, and N. Dudovich, eds., Technical Digest Series (Optica Publishing Group, 2022), paper M1A.4.

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Abstract

Femtosecond X-ray absorption spectroscopy of the disulfide bridge in L-cystine reveals the thyil radical as the only primary photoproduct which geminately recombines in an ultrafast solvent cage-mediated process, leading to the long-lived perthyil radical.

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