Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Paul A. Chrisman"'
Publikováno v:
Journal of the American Chemical Society. 128:11792-11798
Cation radicals formed via gas-phase electron transfer to multiply protonated polypeptides have been found to react with molecular oxygen. Such cation radicals are of interest within the context of electron transfer dissociation, a phenomenon with hi
Publikováno v:
International Journal of Mass Spectrometry. 253:147-155
Ion trap collision-induced dissociation (CID) of a non-covalent complex formed between porcine trypsin and bovine pancreatic trypsin inhibitor (BPTI) has been studied for charge states +10 to +5. Fragmentation of the +10 and +9 complexes formed direc
Autor:
Frank A. Londry, Scott A. McLuckey, Jian Liu, Paul A. Chrisman, Yu Xia, David E. Erickson, Min J. Yang, Xiaorong Liang
Publikováno v:
Analytical Chemistry. 78:4146-4154
A commercial quadrupole/time-of-flight (QqTOF) tandem mass spectrometer has been adapted for ion/ion reaction studies. To enable mutual storage of oppositely charged ions in a linear ion trap, the oscillating quadrupole field of the second quadrupole
Autor:
Sharon J. Pitteri, Jason M. Hogan, Scott A. McLuckey, Brittany D. M. Hodges, Harsha P. Gunawardena, Paul A. Chrisman, Min He
Publikováno v:
Journal of the American Chemical Society. 127:12627-12639
The ion/ion reactions of several dozen reagent anions with triply protonated cations of the model peptide KGAILKGAILR have been examined to evaluate predictions of a Landau–Zener-based model for the likelihood for electron transfer. Evidence for el
Publikováno v:
Analytical Chemistry. 77:5662-5669
In this study, the electron-transfer dissociation (ETD) behavior of cations derived from 27 different peptides (22 of which are tryptic peptides) has been studied in a 3D quadrupole ion trap mass spectrometer. Ion/ion reactions between peptide cation
Publikováno v:
Analytical Chemistry. 77:1831-1839
Ion-ion reactions between a variety of peptide cations (doubly and triply charged) and SO2 anions have been studied in a 3-D quadrupole ion trap, resulting in proton and electron transfer. Electron transfer dissociation (ETD) gives many c- and z-type
Publikováno v:
Analytical Chemistry. 74:6237-6243
An instrument for the study of gas-phase ion/ion reactions in which three independent sources of ions, namely, two electrospray ionization sources and one atmospheric sampling glow discharge ionization source, are interfaced to a quadrupole ion trap
Publikováno v:
International Journal of Mass Spectrometry. 212:359-376
The dissociation of the multiply protonated ions of apomyoglobin ranging in charge from [M + 2H] 2+ to [M + 21H] 21+ have been studied using collisional activation and ion/ion reactions in a quadrupole ion trap. A variety of collisional activation co
Publikováno v:
Analytical Chemistry. 73:3274-3281
One of the major factors governing the "top-down" sequence analysis of intact multiply protonated proteins by tandem mass spectrometry is the effect of the precursor ion charge state on the formation of product ions. To more fully understand this eff
Publikováno v:
Rapid Communications in Mass Spectrometry. 15:2334-2340
The dissociation of holomyoglobin ions ranging in charge state from +10 to +2 has been studied using collisional activation in a quadrupole ion trap. Collisional activation times and amplitudes were varied to investigate the effects of these variable