1. Molecular Biophysics Unit, Indian Institute of Science, Bangalore, Karnataka 560012, India
2. Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, Mailcode 7760, 7703 Floyd Curl Drive, San Antonio, Texas 78229-3900, United States
3. Rudolf Virchow Centre for Experimental Biomedicine, Institute of Structural Biology, University of Wuerzburg, Josef-Schneider-Strasse 2, D-97080 Wuerzburg, Germany
4. NMR Research Center, Indian Institute of Science, Bangalore, Karnataka 560012, India