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A Comparison of Immobilized Trypsin Monolithic Bioreactors for On-line Digestion and Identification of Recombinant Proteins by LC-ESI-MS/MS

The rapidly growing interest in the area of proteomics induces intensive efforts to find robust, automated and sensitive high-throughput analytical tools. In this context, the concept of solid-phase digestion (ex. trypsin immobilization on a solid support[1]) has received great attention in the last years. Trypsin (EC 3.4.21.4) has been covalently immobilized on different monolithic supports and resulting bioreactors used as immobilized enzyme reactors (IMERs) for on-line digestion, peptide separation and peptide mapping. Bioreactors efficiencies were evaluated with different recombinant proteins after on-line digestion. The technique used for the separation and identification of peptides was high-performance liquid chromatography coupled with electrospray ionisation tandem mass spectrometry (LC-ESI-MS/MS).


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