title: Protein engineering: The power of four.
authors: Groningen Biomolecular Sciences and Biotechnology Institute Nijenborgh 4, 9747 AG Groningen, the Netherlands.
authors: Arnold J
authors: AJ
authors: Boersma
authors: Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands.
authors: Gerard
authors: G
authors: Roelfes
mesh_terms: D000667:Ampicillin / Q000737:chemistry*; D002352:Carrier Proteins / Q000737:chemistry*; D019020:Directed Molecular Evolution; D008565:Membrane Proteins / Q000737:chemistry*; D008667:Metalloproteins / Q000737:chemistry*; D015202:Protein Engineering; D015032:Zinc / Q000737:chemistry*; D001618:beta-Lactamases / Q000737:chemistry*
chemical_list: D002352:Carrier Proteins; D008565:Membrane Proteins; D008667:Metalloproteins; D000667:Ampicillin; D001618:beta-Lactamases; D015032:Zinc