1. Institute of Biostructures and
Bioimaging, Consiglio Nazionale delle Ricerche (CNR), Via Mezzocannone 16, I-80134 Napoli, Italy
2. Department of Organic and Biological
Chemistry, University of Naples “Federico II”, Via Cinthia 4, I-80126 Napoli, Italy
3. Department of Microbiology, College
of Physicians and Surgeons, Columbia University, New York, New York 10032, United States
4. European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Notkestrasse
85, 22607 Hamburg, Germany