DNA Topoisomerase I Assay Kit (Catalog number: DRA020K):  For measurement of DNA relaxation activity of topoisomerases in a 96-well or 384-well plate format; for 20 assays; Enzyme is not included.

DNA Topoisomerase I Assay Kit Plus (Catalog number: DRA020KE): For measurement of DNA relaxation activity of topoisomerases in a 96-well or 384-well plate format; for 20 assays; E. coli Topo I is included.

DNA Topoisomerase I assay reagent Set for HTS (Catalog number: DRA1000): For high throughput screen (HTS) of DNA Topoisomerase I inhibitors for the DNA relaxation activity in a 96-well or 384-well plate format; for 1000 assays; DNA or enzyme is not included.

96-well E. coli Topo I DNA Decatenation Assay Plus (Catalog number: T1DD-96KE): For measurement of E. coli topoisomerase I DNA decatenation activity in a 96-well plate format; for 96 assays; E. coli Topo I is included.

Human DNA Topoisomerase I Assay Kit (Catalog number: HRA020K):  For measurement of DNA relaxation activity of human topoisomerase I in a 96-well or 384-well plate format; for 20 assays; enzyme is not included.

Human DNA Topoisomerase I assay reagent Set for HTS (Catalog number: HRA1000):  For high throughput screen of human DNA Topoisomerase I inhibitors for the DNA relaxation activity in a 96-well or 384-well plate format; 1000 assays; DNA or enzyme is not included.

H19 Dye for DNA Relaxation and Supercoiling Assays (Catalog number: DSA1000D): For high throughput DNA relaxation or DNA supercoiling assays of topoisomerases in a 96-well (1000 assays) or 384-well plate format (2000 assays).