1. Dipartimento di Farmacia Università di Napoli Federico II Via Domenico Montesano, 49 80131 Napoli Italy
2. Center for Marine Biotechnology and Biomedicine Scripps Institution of Oceanography Skaggs School of Pharmacy and Pharmaceutical Sciences University of California at San Diego 9500 Gilman Drive, MC 0212 La Jolla CA 92093‐0212 USA
3. Institute of Microbiology Eidgenoessische Technische Hochschule (ETH) Zurich Wolfgang‐Pauli‐Str. 10 8093 Zurich Switzerland