Hyperpolarized Binding Pocket Nuclear Overhauser Effect for Determination of Competitive Ligand Binding

Protein-mediated polarization transfer: Ligands L1 and L2 that competitively bind to a protein are subject to indirect spin-polarization transfer through the binding site of the protein. If protons HL1 of one ligand are hyperpolarized by dynamic nuclear polarization (DNP, see picture), signal intensities in the NMR spectrum of the second ligand become enhanced. The relative build-up of signal of the second ligand yields information on its binding epitope. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.