1. Small Molecule Pharmaceutical Sciences, Genentech Inc., 1 DNA Way, South San Francisco, CA-94080, USA
2. Department of Neuroscience, Genentech, Inc., South San Francisco, CA 94080, USA
3. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Lab, Berkeley, CA, USA
4. Chemistry and Biochemistry Department, University of California Santa Cruz, Santa Cruz, CA, USA