Gel-Based Human Topoisomerase I DNA Relaxation Assay Kit

SKU:BHT16300010
Overview
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Gel-Based Human Topoisomerase I DNA relaxation Assay Kit for testing topo I activity and inhibitor IC50. After the reaction, agarose gel electrophoresis separates relaxed from supercoiled DNA, viewed under UV light. Contains Buffer HT1, supercoiled DNA, gel loading buffer and human topo I (500 U/µl) for 100 samples.
Assay Target Human topo I DNA relaxation
Detection Method Gel Electrophoresis
Options selector
Catalog no. Size
GHRA100KE 100 assays
Available Options

Select the variant that best fits your experiment. Availability and lead time may vary by option.

  • Options: Size: 100 assays
  • Lead time: options listed in "Availability Content"; other statuses may take longer.
  • Storage: Please contact us to confirm storage conditions.
  • Shipping: Shipped frozen.
  • Upon receipt: store at recommended temperature as soon as possible.
  • Sales terms and conditions: Please review prior to ordering.
Field Specification
Organism Human
Applications
  • Enzyme Activity
  • Compound Profiling
Assay type
  • Enzyme Activity Assay
  • Inhibitor Screening Assay
Assay target Human topo I DNA relaxation
Assay area Anticancer Drug Discovery
Target type Topoisomerase
Detection method
  • Gel Electrophoresis
Instrument required UV gel imaging system
Storage Please contact us to confirm storage conditions.
Shipping Shipped frozen.
Catalog no. (Mfr.) GHRA100KE
Main SKU BHT16300010
Drug Target Assay Kit

DNA relaxation is the reaction in which human DNA topoisomerase I (topo I) turns supercoiled circular DNA into its relaxed form.

Kit Components

Component GHRA100KE
10 x Buffer HT1 400 µl
Supercoiled DNA (0.25 mg/ml) 100 µl
5 x Gel loading buffer 550 µl
Human topoisomerase I (500 U/µl) 10 µl

Final reaction concentrations: 25 mM Tris-Cl, pH 7.4, 57 mM KCl, 5 mM MgCl2, 0.25 mM DTT, 0.25 mM EDTA, 15 µg/ml BSA, 12.5 µg/ml supercoiled plasmid DNA and 2.5 U/µl human topo I.

Assay Principle

Supercoiled and relaxed DNA run differently on an agarose gel. After the topo I reaction, samples are separated by agarose gel electrophoresis, stained with ethidium bromide and photographed under UV light; more relaxed DNA means higher topo I activity.

Specifications

Assay Target Human topo I DNA relaxation
Target Type Topoisomerase
Organism Human
Assay Type Enzyme Activity Assay; Inhibitor Screening Assay
Detection Method Gel Electrophoresis
Instrument Required UV gel imaging system
Equipment Required Agarose gel electrophoresis setup and UV light for imaging
Size 100 assays
Storage Please contact us to confirm storage conditions.
Shipping Shipped frozen.

Protocol

The manufacturer's protocol describes the procedure and reaction volumes.

  • Gel-Based Human Topoisomerase I DNA relaxation Assay (PDF, see Documents): Covers catalog # GHRA100KE.

Safety & Handling

For Research Use Only (RUO). Not for use in diagnostic or therapeutic procedures. The Gel-Based Human Topoisomerase I DNA Relaxation Assay Kit is shipped frozen. Follow standard laboratory safety practices when handling the reagents. Please contact us to confirm storage conditions.
Q.What does this kit measure?
A.It measures human topoisomerase I activity by showing the conversion of supercoiled plasmid DNA into relaxed DNA on an agarose gel. It can also be used to test topo I inhibitors.
Q.What is included in the kit?
A.The Gel-Based Human Topoisomerase I DNA Relaxation Assay Kit (100 assays) includes 10 x Buffer HT1 (400 µl), supercoiled DNA (0.25 mg/ml) (100 µl), 5 x gel loading buffer (550 µl) and Human topoisomerase I (500 U/µl) (10 µl).
Q.Is a protocol available?
A.Yes. The manufacturer's protocol (Gel-Based Human Topoisomerase I DNA relaxation Assay, linked under Documents) covers catalog # GHRA100KE.
Q.How should the kit be stored?
A.The Gel-Based Human Topoisomerase I DNA Relaxation Assay Kit is shipped frozen. Please contact us for long-term storage conditions.

Can’t find the exact format you need? We can help you source or customize this human topo I DNA relaxation assay — including larger pack sizes, bulk reagents, bulk enzyme, or a protocol adapted to your samples. Click Talk to a Scientist, email support@biohippo.com, or explore our Research Services. Our team will be in touch shortly.

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Experience the power of Celltrypse™, c-LEcta's innovative enzyme solution for gentle and efficient cell dissociation. Request your free sample and discover a superior alternative for your cell culture workflows.

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