1. Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
2. Nomis Center for Immunobiology and Microbial Pathogenesis & Waitt Advanced Biophotonics Center, Salk Institute for Biological Studies, La Jolla, California 92037, United States
3. Faculty of Biology and Centre for Integrative Biological Signalling Studies (CIBSS), Albert-Ludwigs-University of Freiburg, Freiburg 79104, Germany