Abstract
Liquid chromatography (LC) coupled to mass spectrometry (MS) is increasingly used for quantification of proteins in blood. This development is prompted by ongoing improvements in detection sensitivities of LC-MS instruments and corresponding sample preparation workflows. The combination of immunoaffinity enrichment and targeted LC-MS detection is a notable analytical platform in this regard as it allows for the quantification of low abundance proteins in biological matrices like plasma and serum. Here, we describe such hybrid methods which are based on the enrichment of proteins with antibodies or affimers coupled to adsorptive microtiter plates, the proteolytic digestion of enriched proteins to release protein-specific peptides, and the detection of these peptides by microflow LC coupled to selected reaction monitoring MS.
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Klont, F., Olaleye, O., Bischoff, R. (2023). Quantification of Proteins in Blood by Absorptive Microtiter Plate-Based Affinity Purification Coupled to Liquid Chromatography-Mass Spectrometry. In: Greening, D.W., Simpson, R.J. (eds) Serum/Plasma Proteomics. Methods in Molecular Biology, vol 2628. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2978-9_15
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DOI: https://doi.org/10.1007/978-1-0716-2978-9_15
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