1. Institute of Enzymology, Biological Research Center, Hungarian Academy of Sciences, Budapest, Hungary, Laboratorio de Química de Proteinas y Proteómica, Centro de Biología Molecular Severo Ochoa, CSICK−Universidad Autónoma de Madrid, Madrid, Spain, Department of Zoology, University of Eötvös Loránd, Budapest, Hungary, and Department of Medical Chemistry, Faculty of Medicine, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary