Journal
ANALYTICAL CHEMISTRY
Volume 80, Issue 7, Pages 2590-2598Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac702319u
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Membrane proteins comprise 25-30% of the human genome and play critical roles in a wide variety of important biological processes. However, their hydrophobic nature has compromised efforts at structural characterization by both X-ray crystallography and mass spectrometry. The detergents that are generally used to solubilize membrane proteins interfere with the crystallization process essential to X-ray studies and cause severe ion suppression effects that hinder mass spectrometric analysis. In this report, the use of supercritical fluid chromatography-mass spectrometry for the separation and analysis of integral membrane proteins and hydrophobic peptides is investigated. It is shown that detergents are rapidly and effectively separated from the proteins and peptides, yielding them in a state suitable for direct mass spectrometric analysis.
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