1. Colorimetric screening of bacterial enzyme activity and inhibition based on the aggregation of gold nanoparticlesElectronic supplementary information (ESI) available: Synthesis of substrate, the enzymatic inhibition assay, and tests on bacterial strains. See DOI: 10.1039/b818853j Author Tingting JiangT. J. and R. L. contributed equally to the work in this paper., Rongrong Liu, Xianfeng Huang, Huajun Feng, Weiling Teo, and Bengang Xing Subjects *COLORIMETRIC analysis, *COLLOIDAL gold, *MICROBIAL enzymes, *BETA lactamases, *ENZYME activation, *ENZYME inhibitors Abstract A simple and novel gold nanoparticle (Au-NPs) based colorimetric method has been developed for efficient screening of class A β-lactamase (Bla) activity and inhibitors in vitroand in bacterial strains. [ABSTRACT FROM AUTHOR] Published 2009 Full Text View/download PDF