Our website does not fully support your browser.

We've detected that you are using an older version of Internet Explorer. Your commerce experience may be limited. Please update your browser to Internet Explorer 11 or above.

We believe this site might serve you best:

United States

United States

Language: English

Promega's Cookie Policy

Our website uses functional cookies that do not collect any personal information or track your browsing activity. When you select your country, you agree that we can place these functional cookies on your device.

HaloCHIP™ System: Mapping Intracellular Protein:DNA Interactions using HaloTag® Technology

Danette D. Hartzell, Jacqui Méndez, Katharine Hoffman, Doug Storts, Marjeta Urh and Keith Wood
Promega Corporation
Publication Date: 2007


The HaloCHIP™ System is a novel method that covalently captures intracellular protein:DNA complexes without using antibodies. DNA binding proteins of interest are expressed in cells as HaloTag® fusion proteins, crosslinked to DNA, and then captured on HaloLink™ Resin, which forms a highly specific, covalent interaction with the HaloTag® moiety on the fusion protein. Due to the complete covalent linkage established between the HaloLink™ Resin and the crosslinked protein:DNA complexes, the resin can be stringently washed to remove nonspecific DNA and protein more effectively than is possible by coimmunoprecipitation. The crosslinks are reversed to release purified DNA fragments from the resin. By improving specificity and reducing background interference during the isolation of protein:DNA complexes, this new method effectively increases the signal-to-noise ratio to permit detection of small changes in protein binding within a genome.

Promega Notes 97, 18–21.

Related Resources