Peptide and Protein Identification by Matrix-assisted Laser Desorption Ionization (MALDI) and MALDI-post-source Decay Time-of-flight Mass Spectrometry

Overview

Journal J Am Soc Mass Spectrom

Specialty Chemistry

Date 1999 Feb 2

PMID 9926404

Citations 26

Authors

P Chaurand

F Luetzenkirchen

B Spengler

Affiliations

Soon will be listed here.

Abstract

The potential of matrix-assisted laser desorption ionization (MALDI) and MALDI-post-source decay (PSD) time-of-flight mass spectrometry for the characterization of peptides and proteins is discussed. Recent instrumental developments provide for levels of sensitivity and accuracy that make these techniques major analytical tools for proteome analysis. New software developments employing protein database searches have greatly enhanced the fields of application of MALDI-PSD. Peptides and proteins can be easily identified even if only a partial sequence information is determined. Derivatization procedures have been optimized for MALDI-PSD to increase the structural information and to obtain a complete peptide sequence even in critical cases. They are fast, simple and can be performed on target. MALDI-PSD is also a very powerful tool to characterize or elucidate post-translational or chemically induced modifications. In association with database searches, proteins issued from electrophoretic gels can be identified after specific enzymatic cleavages and peptide mapping.

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