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1997•Journal of Mass SpectrometryRequires access

Fast Atom Bombardment Mass Spectra ofN-Phosphorylated Peptide Analogs

Hua Fu, Zhaolong Li, Jingzun Wang, Yufen Zhao

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Abstract

A series of N-(N-alkyl)- and N-(O-alkyl)phosphopeptide analogs were determined by positive and negative ion fast atom bombardment mass spectrometry and their fragmentation pathways were investigated. Their mass spectra gave abundant [MH-NH2R′]+, [MH-HOR″]+, [MH-H2O]+ or [M-H-NH2R′]-, [M-H-HOR″]- ions, which contained pentavalent tricoordinate phosphorus ions through the loss of amine or water. In the positive ion mass spectra, +NH3R′ and +NH3CHRCONHR′ were found, while [MH -NH2CHRCONHR′]+ was suppressed. In the negative ion mass spectra, the pseudomolecular ion [M-H]- was the base peak, and almost all the fragment ions contained a phosphoryl group. © 1997 by John Wiley & Sons, Ltd.

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What this paper is about

A series of N-(N-alkyl)- and N-(O-alkyl)phosphopeptide analogs were determined by positive and negative ion fast atom bombardment mass spectrometry and their fragmentation pathways were investigated. Their mass spectra gave abundant [MH-NH2R′]+, [MH-HOR″]+, [MH-H2O]+ or [M-H-NH2R′]-, [M-H-HOR″]- ions, which contained pentavalent tricoordinate phosphorus ions through the loss of amine or water. In the positive ion mass spectra, +NH3R′ and +NH3CHRCONHR′ were found, while [MH -NH2CHRCONHR′]+ was suppressed. In the negative ion mass spectra, the pseudomolecular ion [M-H]- was the base peak, and almost all the fragment ions contained a phosphoryl group. © 1997 by John Wiley & Sons, Ltd.

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Available abstract

A series of N-(N-alkyl)- and N-(O-alkyl)phosphopeptide analogs were determined by positive and negative ion fast atom bombardment mass spectrometry and their fragmentation pathways were investigated. Their mass spectra gave abundant [MH-NH2R′]+, [MH-HOR″]+, [MH-H2O]+ or [M-H-NH2R′]-, [M-H-HOR″]- ions, which contained pentavalent tricoordinate phosphorus ions through the loss of amine or water. In the positive ion mass spectra, +NH3R′ and +NH3CHRCONHR′ were found, while [MH -NH2CHRCONHR′]+ was suppressed. In the negative ion mass spectra, the pseudomolecular ion [M-H]- was the base peak, and almost all the fragment ions contained a phosphoryl group. © 1997 by John Wiley & Sons, Ltd.

Key concepts: Chemistry, Fast atom bombardment, Mass spectrum, Phosphopeptide, Fragmentation (computing), Ion, Alkyl, Mass spectrometry

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