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Fast fragmentation during surface-induced dissociation: An examination of peptide size and structure

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Abstract We present the results of direct dynamics simulations of surface-induced dissociation for protonated versions of AnK, KAn (n = 1, 3, and 5), AcA7K, and AcKA7 for collisions with… Click to show full abstract

Abstract We present the results of direct dynamics simulations of surface-induced dissociation for protonated versions of AnK, KAn (n = 1, 3, and 5), AcA7K, and AcKA7 for collisions with a fluorinated self-assembled monolayer surface. We focus on elucidating fast fragmentation events, which takes place in coincidence with the collision event. Such events generate a large number of products, and hence, are not easily understood through chemical intuition. Our simulations show distinct differences between the AnK/AcA7K and KAn/AcKA7 series of peptides, with the former being more reactive, and the latter more selective. Backbone rearrangements and sidechain fragmentation are also seen.

Keywords: induced dissociation; fast fragmentation; fragmentation; surface induced

Journal Title: Chemical Physics Letters
Year Published: 2020

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