1. Berkeley Synchrotron Infrared Structural Biology Program, Lawrence Berkeley National Laboratory , Berkeley, California , USA
2. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory , Berkeley, California , USA
3. Center for Advanced Mathematics in Energy Research Applications, Lawrence Berkeley National Laboratory , Berkeley, California , USA
4. Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California , USA
5. Applied Mathematics & Computational Research, Lawrence Berkeley National Laboratory , Berkeley , California , USA