Enantiomeric two-armed lanthanide-binding tags for complementary effects in paramagnetic NMR spectroscopy†
Abstract
Two-armed lanthanide-binding tags induce significant, long-range paramagnetic effects in the NMR spectra of attached proteins. An enantiomeric pair of rigid, two-armed, cyclen-based tags are reported that produce markedly different effects from the same tagging site, allowing for the measurement of complementary paramagnetic restraints for structural studies.