Differential Protein Expression Analysis via Liquid-Chromatography/Mass-Spectrometry Data Visualization

Differential protein expression analysis is one of the main challenges in proteomics. It denotes the search for proteins, whose encoding genes are differentially expressed under a given experimental setup. An important task in this context is to identify the differentially expressed proteins or, more generally, all proteins present in the sample. One of the most promising and recently widely used approaches for protein identification is to cleave proteins into peptides, separate the peptides using liquid chromatography, and determine the masses of the separated peptides using mass spectrometry. The resulting data needs to be analyzed and matched against protein sequence databases. The analysis step is typically done by searching for intensity peaks in a large number of 2D graphs. We present an interactive visualization tool for the exploration of liquid-chromatography/mass-spectrometry data in a 3D space, which allows for the understanding of the data in its entirety and a detailed an...

• Type: Conference
• Year: 2005
• Where: VIS
• Authors: Lars Linsen, Julia Löcherbach, Matthias Berth, Jörg Bernhardt
• Keywords: Multi-dimensional Protein Identification, Protein Sequence Databases, Separated Peptides, VIS 2005, Visualization