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Gas-phase formation of large neutral alkaline-earth metal tryptophan complexes

Marksteiner, Markus, Haslinger, Philipp, Ulbricht, Hendrik, Sclafani, Michele, Oberhofer, Harald, Dellago, Christoph and Arndt, Markus (2008) Gas-phase formation of large neutral alkaline-earth metal tryptophan complexes Journal of the American Society for Mass Spectrometry, 19, (7), pp. 1021-1026. (doi:10.1016/j.jasms.2008.04.028).

Record type: Article

Abstract

We report on the first observation of isolated large neutral metal amino acid complexes such as TrpnMek, with Me = Ca, Ba, Sr, cluster combinations covering n=1…33, k=0..2 and masses beyond 6500 u. The cluster beam is generated using UV laser desorption from a mixed powder of alkaline-earth metal salts and tryptophan inside a cluster mixing channel. The particles are detected using VUV photoionization followed by time-of-flight mass spectroscopy. The enhanced stability of metal amino acid clusters over pure amino acid clusters is substantiated in molecular dynamics simulations by determining the gain in binding energy related to the inclusion of the metal atoms

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Published date: July 2008

Identifiers

Local EPrints ID: 144281
URI: http://eprints.soton.ac.uk/id/eprint/144281
ISSN: 1044-0305
PURE UUID: 250ff0d4-5efd-4fc7-9350-4fce6b9b6a9c

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Date deposited: 14 Apr 2010 08:13
Last modified: 18 Jul 2017 23:08

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Contributors

Author: Markus Marksteiner
Author: Philipp Haslinger
Author: Hendrik Ulbricht
Author: Michele Sclafani
Author: Harald Oberhofer
Author: Christoph Dellago
Author: Markus Arndt

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