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Título: | Anion formation in gas-phase potassium-uridine collisions |
Autor: | Almeida, D.; Ferreira da Silva, F.; Kopyra, J.; García, Gustavo CSIC ORCID; Limão-Vieira, P. | Palabras clave: | Atomic collisions Electron transfer Negative ion Uridine Nucleoside |
Fecha de publicación: | 15-may-2014 | Editor: | Elsevier | Citación: | International Journal of Mass Spectrometry 365-366: 243- 247 (2014) | Resumen: | In this study we report negative ion fragmentation patterns obtained from time-of-flight (TOF) mass spectrometry in potassium-uridine collisions at 30, 70 and 100 eV. The dominant fragments from uridine are also the most abundant from the individual units in potassium collisions with uracil, tetrahydrofuran (THF) and d-ribose. We observe no dehydrogenated parent anion formation. Special emphasis is given to the dissociation mechanisms lending support to the breaking of the N-glycosidic bond as an initial step in the fragmentation of the transient negative ion (TNI). Within their role as sugar unit surrogates, THF and d-ribose (DR) provide useful information for the study of uridine, and presumably other nucleosides from the point of view of DNA/RNA subunits integrity in the biological environment. © 2014 Elsevier B.V. | Descripción: | 5 pags.; 2 figs.; 1 tab. | Versión del editor: | http://dx.doi.org/10.1016/j.ijms.2014.01.023 | URI: | http://hdl.handle.net/10261/112079 | DOI: | 10.1016/j.ijms.2014.01.023 | Identificadores: | doi: 10.1016/j.ijms.2014.01.023 issn: 1387-3806 |
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