Proteomics global displays

Global proteomic techniques are used for biological problems for which no molecular entry point is known. The idea is that changes in a cellular system can be understood better by analyzing its entire protein content quantitatively. The main analytical tools are a global and quantitative protein display and mass spectrometry to characterize the proteins that were identified for showing relevant quantitative changes. 

Precise quantifications are an important quality in molecular biology. There are slight differences in the methods used for global and targeted proteomics. In experiments intended to visualize as many proteins as possible, it is highly desirable to have a parallel quantification method that builds on the display technique. For 2D gel electrophoresis, fluorescent staining methods are under development (Urwin and Jackson, 1993), but they still lack overall sensitivity. Labeling proteins with radioactive isotopes is the most precise method for quantification but is limited to cell cultures, and alternatives are desirable. Recently, a precise method... 

Proteomics can be divided into two major areas of research—global and targeted proteomics (Pandey and Mann 2000). Global proteomics compares protein expression in a cell, tissue, or body fluid in a comprehensive and global fashion. In this approach, proteins derived from a total cellular or tissue extract or from a body fluid are typically displayed on two-dimensional gels and... 

The biochemical approach of two-dimensional electrophoresis which has become the classical proteomic approach to whole proteome analysis has the capacity to display a large number of proteins expressed the studied system under given physiological conditions. Construction of global expression maps for defined proteomes is the most widely used application of proteomics and when used in combination with mass spectrometry (MS) techniques can be a powerful approach. There have been a number of studies focused on global neuroproteomics from whole brain analysis to the analysis of synaptic components. Two-dimensional maps have been constructed for whole human (Langen, Bemdt et al. 1999) mouse (Gauss, Kalkum et al. 

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