Abstract
Surface plasmon resonance (SPR) is an optical effect at an electron-rich surface that enables affinity measurements of biomolecules in real time. It is label free and versatile, not limited to proteins, nucleic acids, and small molecules. SPR is a widely accepted method to measure not only affinity of molecular interactions but also association and dissociation rates of such interactions. In this chapter, we describe a general method to measure the affinity of a small molecule drug, MRTX849, to GDP bound HRAS, KRAS, and NRAS.
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