Plasma desorption mapping of the tryptic digest of 23-kDa recombinant human growth hormone

Ling Chen, Robert J. Cotter, John T. Stults

Research output: Contribution to journalArticle

Abstract

Plasma desorption mass spectrometry has been used to map the tryptic fragments from the 23-kDa recombinant human growth hormone protein. The unfractionated tryptic digest was adsorbed directly onto a nitrocellulose sample foil and mass spectra were obtained in both the positive and the negative ion mode. The adsorbed sample was then washed with deionized water and its mass spectrum was again obtained. The latter spectrum revealed tryptic fragments that were not observed in the spectra of the unwashed sample, which can be attributed (to some extent) to the removal of hydrophilic residues during washing. From this study a protocol, aimed at the complete mapping of tryptic fragments, is outlined.

Original languageEnglish (US)
Pages (from-to)190-194
Number of pages5
JournalAnalytical biochemistry
Volume183
Issue number1
DOIs
StatePublished - Nov 15 1989

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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