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Recently, we reported that 157nm vacuum ultraviolet irradiation (VUV) of proton-bound peptide dimers trapped in a vacuum, results in the elimination of water and formation of a peptide bond [J. Am. Chem. Soc. 133 (2011) 15834–15837]. Here, we further explore the ability to form a covalent bond between biomolecular ions with photoexcitation. Photoexcitation of long-lived charge-bound complexes appears...
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