Gaseous Dipeptide Complexes with Met al Ions by Electrospray Ionization and Tandem Mass Spectrometry

Abstract

Abstract: Electrospray ionization(ESI) and tandem mass spectrometry have been used to investigate the gas phase interactions of five met al ions and seven dipeptides. For silver ion, two complexes([M+Ag]⁺ and [2M+Ag]⁺) were obtained as well as the one complex ([2M+M et2H]⁺) for transition met al ions. Upon collision activation, there is an obvious difference in MS/MSdata between met al ion complex and the protonated molecule. The fragment pathway of each complex is related to the structures of dipeptide and the nature of met al ion which suggest that there are several interaction between the met al ions and dipeptides in gas phase.

Key words: Electrospray ionization mass spectrometry, Met al ions/dipeptide complexes, Tandem mass spectrometry

CLC Number:

O657.63

TrendMD:

CUI Meng, LIU Zhi-Qiang, SONG Feng-Rui, LIU Shu-Ying . Gaseous Dipeptide Complexes with Met al Ions by Electrospray Ionization and Tandem Mass Spectrometry[J]. Chem. J. Chinese Universities, 2001, 22(7): 1111.

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Gaseous Dipeptide Complexes with Met al Ions by Electrospray Ionization and Tandem Mass Spectrometry

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