1 Institute of Biological Sciences, Federal University of Pará (UFPA), Belém, Brazil sylvain@ufpa.br hubert.schaller@ibmp-cnrs.unistra.fr.
2 Departments of Ophthalmology and Biochemistry and the Neuroscience Graduate Program, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY.
3 Research Service, Veterans Administration Western NY Healthcare System, Buffalo, NY.
4 Institut de biologie moléculaire des plantes, CNRS, Université de Strasbourg, Strasbourg, France sylvain@ufpa.br hubert.schaller@ibmp-cnrs.unistra.fr.