Editorial : Protein Aggregation and Solubility in Microorganisms (Archaea, Bacteria and Unicellular Eukaryotes): Implications and Applications - Skretas, Georgios (National Hellenic Research Foundation. Institute of Chemical Biology) ; Ventura, Salvador (Universitat Autònoma de Barcelona. Institut de Biotecnologia i de Biomedicina "Vicent Villar Palasí") ; Universitat Autònoma de Barcelona. Departament de Bioquímica i de Biologia Molecular