Creative BioMart Protein Deubiquitination Assay provides a simple solution for screening activity of deubiquitination enzymes (DUBs) from cell extracts or purified recombinant proteins in human, mouse and rat systems. The assay contains a fluorescent ubiquitin substrate that when processed by the cysteine protease class of DUBs releases a fluorescent signal that is proportional to the amount of enzymatic activity. Visit http://www.creativebiomart.net/Protein-Deubiquitination-Assay.htm.