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American Chemical Society, Journal of The American Society for Mass Spectrometry, 2(24), p. 265-273, 2012

DOI: 10.1007/s13361-012-0532-6

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Comparison of MS/MS Methods for Characterization of DNA/cisplatin Adducts

Journal article published in 2012 by Zhe Xu, Jared B. Shaw ORCID, Jennifer S. Brodbelt
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The development of activation/dissociation techniques such as ultraviolet photodissociation (UVPD), infrared multiphoton dissociation (IRMPD) and electron transfer dissociation (ETD) as alternatives to collision induced dissociation (CID) has extended the range of strategies for characterizing biologically relevant molecules. Here, we describe a comprehensive comparison of CID, IRMPD, UVPD, ETD and hybrid processes termed ETcaD and ET-IRMPD (and analogous hybrid methods in the negative mode NETcaD and NET-IRMPD) for generating sequence specific-fragment ions and allowing adduction sites to be pinpointed for DNA/cisplatin adducts. Among the six MS/MS methods, the numerous products generated by the IRMPD and UVPD techniques resulted in the most specific and extensive backbone cleavages. We conclude that IRMPD and UVPD methods generally offer the best characteristics for pinpointing the cisplatin adduction sites in the fragment-rich spectra.