Béla Paizs is an Hungarian bioinformatician. His research interests revolve around fragmentation of peptides in mass spectrometry. In top-down proteomics, the interpretation of fragment ion spectra of peptides is a crucial step. The research of Béla Paizs have led to detailed characterization of peptide fragment ion structures and dissociation mechanisms, and have shown underlying fundamental physical and chemical principles. His work has been recognized with the American Society for Mass Spectrometry Biemann Medal in 2011.