%0 Journal Article
%T An anomalous dissociation of protonated cluster ions of DNA guanine-cytosine base-pair
%A Yeonmi Seong
%A Sang Yun Han
%A Sung-Chan Jo
%A Han Bin Oh
%J Mass Spectrometry Letters
%D 2011
%I Korean Society for Mass Spectrometry
%X In the collisionally-activated dissociation of the proton-bound cluster ions of DNA base guanine (G) and cytosine (C), G  H+  C, the abundance of [CH+] ions was found to be higher than that of [GH+] despite the fact that G has a higher proton affinity than C. This unexpected observation seems to demonstrate another example that the simple kinetic method scheme does not work. We suggest that a kinetic factor or detailed dynamics governing the proton transfer and dissociation should be carefully considered in the applications of the kinetic method to the proton affinity measurements.
%K Pronton affinity
%K Collisional dissociation
%K Proton transfer
%K Guanine
%K Cytosine
%U http://www.msletters.org/journal.do?method=journalintro&journalSeq=J000011