Creative BioMart provides protein SUMOylation assay system for generating SUMOylated proteins in vitro. We provide carboxy-terminal SUMO-1, SUMO-2 or SUMO-3 peptide substrates which are linked covalently to specific lysine residues on the target protein via isopeptide bonds. Visit http://www.creativebiomart.net/Protein-SUMOylation-Assay.htm to know more.