[1] Scripps Res Inst, Dept Integrat Struct & Computat Biol, La Jolla, CA 92037 USA
[2] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
[3] Vrije Univ Brussel, Dept Chem, Brussels, Belgium
[4] Vrije Univ Brussel, Dept Bioengn Sci, Brussels, Belgium
[5] Univ N Carolina, Chapel Hill Med Sch, NIMH, Psychoact Drug Screening Program, Chapel Hill, NC USA
[6] Univ N Carolina, Chapel Hill Med Sch, Dept Pharmacol, Chapel Hill, NC USA
[7] Univ N Carolina, Chapel Hill Med Sch, Div Chem Biol & Med Chem, Chapel Hill, NC USA
[8] SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA USA
[9] Deutsch Elektronen Synchrotron DESY, Ctr Free Elect Laser Sci, Hamburg, Germany
[10] Univ Hamburg, Inst Biochem & Mol Biol, Hamburg, Germany
[11] Univ Hamburg, Dept Phys, Hamburg, Germany
[12] European Xray Free Electron Laser Facil XFEL GmbH, Hamburg, Germany
[13] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ USA
[14] Arizona State Univ, Biodesign Inst, Ctr Appl Struct Discovery, Tempe, AZ USA
[15] Clin Res Inst Montreal, Lab Chem Biol & Peptide Res, Montreal, PQ H2W 1R7, Canada