title: A solid sample preparation method that reduces signal suppression effects in the MALDI analysis of peptides.
abstract: Here we report on the application of a solid-solid (SS) sample preparation protocol for the MALDI analysis of peptides and multicomponent peptide mixtures. Our results with a series of model peptides indicate that a SS MALDI sample preparation protocol is useful for the analysis of peptides in the 1-3 kDa mass range. MALDI mass spectra recorded for peptides in this size range using a SS sample preparation were of a quality comparable to spectra recorded using a conventional dried-droplet (DD) sample preparation. Our results with several model peptide mixtures indicate that one advantage of a SS sample preparation protocol for the MALDI analysis of peptides is that it can significantly reduce signal suppression effects in multicomponent mixtures. MALDI results obtained using a SS sample preparation protocol are also more reproducible than results obtained using a conventional DD sample preparation protocol.
authors.affiliation: Department of Chemistry, Duke University, Durham, North Carolina 27708, USA.
authors.forename: M Z
authors.initials: MZ
authors.lastname: Wang
authors.forename: M C
authors.initials: MC
authors.lastname: Fitzgerald
mesh_terms: D000595:Amino Acid Sequence; D008969:Molecular Sequence Data; D010455:Peptides / Q000032:analysis* / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*
chemical_list: D010455:Peptides