A convenient method to extract matrix-assisted laser desorption/ionization mass spectrometry spectra from phosphate-containing peptide mixtures

Sheng Yu Huang, Jue Liang Hsu, Nicholas A. Morrice, Chin Jen Wu, Shu Hui Chen

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Here we report that the addition of HCl or HNO3 to the matrix at a limited concentration dramatically increases the signal-to-noise ratio of the matrix-assisted laser desorption/ionization mass spectrometry spectrum of phosphate-containing peptide mixtures such as those obtained from an immobilised metal affinity capture eluent or a phosphate-containing tryptic digest. These improved spectra permitted both peptide identification and the determination of protein phosphorylation sites. In comparison to existing methods for removing salts, this method requires less sample manipulation and thus less sample loss is expected.

Original languageEnglish
Pages (from-to)1935-1938
Number of pages4
JournalProteomics
Volume4
Issue number7
DOIs
Publication statusPublished - 2004 Jul

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology

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