Human Topoisomerase I

Human Topoisomerase I is prepared by overexpressing the enzyme in baculovirus-infected insect cells (Spodoptera frugiperda) and purifying it by methods adapted from Stewart et al., 1996. The enzyme is supplied μl in Dilution Buffer.

Store at -80°C. It is recommended that the enzyme is aliquoted to avoid repeated freeze-thaw cycles.

See technical documents below for more detailed information and lot specific activities.

Technical Documents

Cat No.	Product	Price	Quantity
HT101	Human Topo I100 U	£75
HT105	Human Topo I500 U	£230
HT110	Human Topo I1000 U	£385
HT120	Human Topo I2000 U	£640

Custom QuoteAdd to Cart

These contain the enzyme and the supercoiled DNA substrate in addition to the Assay and Dilution buffers for relaxation reactions. 1 U of human topo I will relax 0.5 µg supercoiled pBR322 DNA in 30 minutes at 37°C. 

Technical Documents

Cat No.	Product	Price	Quantity
HTR101	Human Topo I Relaxation Assay Kit 1100 U of human topo I and 50 µg of supercoiled DNA	£195
HTR102	Human Topo I Relaxation AssayKit 2500 U of human topo I and 250 µg of supercoiled DNA	£615
HTR103	Human Topo I Relaxation AssayKit 31000 U of human topo I and 500 µg of supercoiled DNA	£1,150
HTR104	Human Topo I Relaxation AssayKit 42000 U of human topo I and 1 mg of supercoiled DNA	£1,800

Custom QuoteAdd to Cart

These kits are designed for assaying cell extracts and partially purified fractions containing human topo I. They contain supercoiled DNA substrate, Assay buffer, Dilution buffer and relaxed DNA marker.

The kit components are based on the standard human topo I assay whch contains 500 ng substrate DNA per assay.

Technical Documents

Cat No.	Product	Price	Quantity
TRAK1	Human Topo I Cell Extract Assay Kit 1Contains sufficient assay buffers, supercoiled and relaxed marker DNA for 100 assays	£162
TRAK2	Human Topo I Cell Extract AssayKit 2Contains sufficient assay buffers, supercoiled and relaxed marker DNA for 250 assays	£409

Custom QuoteAdd to Cart

The kit is supplied with sufficient human topo I enzyme, plasmid DNA substrate, buffers and other assay components* for 100 assays. The enzyme is supplied at a concentration of 10 U/μl in Dilution Buffer. The kit is also supplied with sufficient wash buffers for one 96-well plate. These buffers are supplied as 20X concentrates and must be diluted with ultra pure water prior to use.

More information about this assay can be found on the "Services" page under "High/Medium Throughput Assay".

Kit issued with limited licence for individual use only. 

Patent held by Inspiralis Ltd., Norwich, Norfolk, UK. (Patent No. GB0424953.8, US7838230).

Technical Documents

Cat No.	Product	Price	Quantity
TRT101	HTS Assay Kit - Human Topo I 1-5 kitsfor 100 assays per plate	£430
TRT102	HTS Assay Kit - Human Topo I 6+ Kitsfor 100 assays per plate	£346

Custom QuoteAdd to Cart