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Submitted on May 1, 2006
Institute for Systems Biology, Seattle, WA 98103
Corresponding Author: hzhang{at}systemsbiology.org
It has long been thought that blood plasma could serve as a window into the state of ones organs in health and disease because tissue-derived proteins represent a significant fraction of the plasma proteome. While substantial technical progress has been made towards the goal of comprehensively analyzing the blood plasma proteome, the basic assumption that proteins derived from a variety of tissues could indeed be detectable in plasma using current proteomic technologies has not been rigorously tested. Here, we provide evidence that such tissue-derived proteins are both present and detectable in plasma via direct mass spectrometric analysis of captured glycopeptides, and thus provide a conceptual basis for plasma protein biomarker discovery and analysis.
Revised on October 9, 2006
Accepted on October 9, 2006
Mass spectrometric detection of tissue proteins in plasma
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