1 Cross-Correlated Relaxation for the Measurement of Angles between Tensorial Interactions Harald Schwalbe 1 * , Teresa Carlomagno 2 , Isabella C. Felli 3 , Mirko Hennig 2 , Jochen Junker 6 , Bernd Reif 4 , Christian Richter 5 , and Christian Griesinger 6,7 * 1 Center for Magnetic Resonance, Francis Bitter Magnet Laboratory and Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA 02139, USA; 2 Department of Molecular Biology & Skaggs Institute of Chemical Biology, The Scripps Research Institute, MB 33, 10550 North Torrey Pines Rd., La Jolla, CA 92037, USA; 3 Centro di Risonanze Magnetiche, Polo Scientifico Universita’ degli Studi di Firenze, Via Luigi Sacconi 6, 50019 Sesto Fiorentino (FI), Italia; 4 Institut für Organische Chemie, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany; 5 Bruker AG, Industriestrasse 26, CH-8117 Fällanden, Switzerland; 6 Institut für Organische Chemie, Marie-Curie-Straße 11, Universität Frankfurt, D-60439 Frankfurt, Germany; 7 Max-Planck Institut für Biophysikalische Chemie, Am Faßberg, 37077 Göttingen, Germany. *Corresponding Authors.