Tandem mass spectrometry of bilin tetrapyrroles by electrospray ionization and collision-induced dissociation.
Tandem mass spectrometry of bilin tetrapyrroles by electrospray ionization and collision-induced dissociation.
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通过电喷雾电离和碰撞诱导解离对胆碱四吡咯进行串联质谱分析。
DOI:
10.1002/rcm.6287
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Wood,TroyD
中科院分区:
文献类型:
--
作者:
Quinn,KevinD;Nguyen,NhuQT;Wach,MichaelM;Wood,TroyD
RATIONALEBilins are metabolic products of hosts and bacteria on porphyrins, and are markers of health state and human waste contamination. Although bilin tandem mass spectrometry reports exist, their fragmentation behavior as a function of structure has not been compared, nor has fragmentation been examined as a function of collision energy.METHODSThe fragmentation of bilins generated by positive ion mode electrospray ionization is examined by collision‐induced dissociation (CID). CID on a quadrupole ion trap and on a Fourier transform ion cyclotron resonance (FT‐ICR) mass spectrometer as a function of collision energy is compared. Methyl esterification was used to deduce which product ions contain the inner pyrrole rings. FT‐ICR high mass accuracy measurements were used to determine the formulas of the resultant product ions.RESULTSThe central carbon's bonding to the inner pyrrole rings influences fragmentation. Bilirubin is unique because fragmentation adjacent to the central methylene group between innermost rings predominates, and loss of a terminal pyrrole is observed only with helium collision gas. The other bilins lose the terminal pyrroles first; as CID energy is increased, additional fragmentation due to neutral losses of small molecules such as H2O, CO, CO2, and methanol occurs.CONCLUSIONSBased on these observations, fragmentation schemes for the bilins are proposed that are strongly dependent on the molecular structure and collision energy; only bilirubin fragmentation is influenced significantly by the collision gas used. This report should have value in identification of this class of molecules for biomarker detection. Copyright © 2012 John Wiley & Sons, Ltd.
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DOI:
10.1042/bj1170271
发表时间:
1970
期刊:
The Biochemical journal
影响因子:
--
作者:
M. Stoll;C. Gray
通讯作者:
C. Gray
影响因子:
64.8
作者:
S. Al;D. Miller;R. U. Qureshi;J. Yudkin
通讯作者:
J. Yudkin
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
J. Szulejko;Sally Hall;M. Jackson;T. Solouki
通讯作者:
T. Solouki
DOI:
10.1073/pnas.45.10.1476
发表时间:
1959
影响因子:
11.1
作者:
B. Pullman;A. Pérault
通讯作者:
A. Pérault
DOI:
10.1016/0304-4165(72)90119-5
发表时间:
1972-01-01
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
FAHMY, K;GRAY, CH;NICHOLSON, DC
通讯作者:
NICHOLSON, DC