Keynote speakers:Nitric Oxide Sensing by a Blue Fluorescent ProteinThomas Gensch, Forschungszentrum Jülich (Germany) Computational modeling and design of intracellular indicators based on Fluorescent ProteinsRiccardo Nifosì, Istitutodi Nanoscienze, CNR, Pisa (Italy) Nitric Oxide photorelease, self reporting and sensingSalvo Sortino, Università di Catania (Italy)