Streamlined SPRi-MS coupling to detect and identify a kinase in Cell lysate using the DARPins as binders

DARPins (Designed Ankyrin Repeat Proteins) are a class of non-immunoglobulin binders. Thanks to their specificity and robustness, they allow a multitude of novel, so far unfeasible applications. Surface Plasmon Resonance imaging (SPRi) is a powerful label-free technique that enables real-time target detection. Combining SPRi to massspectrometry (MS) allows biomolecules identification using their unique peptide mass fingerprint. In the past this combination was cumbersome and time-consuming. This application note shows how a protein kinase (RPS6KA2), a potential drug target is detected and identified using a hyphenated On-Chip SPR-MS coupling protocol, leading to saving time and money.

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