This product includes 600 ul of 10 x assay buffer, 500 ul of 10 x concatenated DNA, 120 ul of 10 mM ATP, 100 ul of 50 x S. aureus gyrase, 600 ul of Stop solution (0.4 M EDTA), 500 ul of 10 x fluorescence dye, 2 ml of 10 x rinse buffer, one V-bottom plate, a TDD filter plate and one black 96-well plates for 96 assays of DNA decatenation reactions.