1. Laboratorio de Estudios Cristalograficos; IACT, CSIC-University of Granada; Avenida de las Palmeras 4 18100 Armilla Spain
2. Structural Biology Brussels (DBIT); Flanders Interuniversity Institute for Biotechnology (VIB); Vrije, Universiteit Brussel, Pleinlaan 2 1050 Elsene Belgium