μChIP: Chromatin Immunoprecipitation for Small Cell Numbers

  • John Arne Dahl
  • Philippe Collas
Part of the Methods in Molecular Biology book series (MIMB, volume 567)


Chromatin immunoprecipitation (ChIP) is a technique of choice for studying protein–DNA interactions. ChIP has been used for mapping the location of modified histones on DNA, often in relation to transcription or differentiation. Conventional ChIP protocols, however, require large number of cells, which limits the applicability of ChIP to rare cell samples. ChIP assays for small cell numbers (in the range of 10,000–100,000) have been recently reported; however, these remain lengthy. Our laboratory has elaborated fast ChIP assays suitable for small cell numbers (100–100,000) and for the immunoprecipitation of histone proteins or transcription factors under cross-linking conditions. We describe here a rapid micro (μ)ChIP assay suited for multiple parallel ChIPs from a single chromatin batch from 1,000 cells. The assay is also applicable to a single immunoprecipitation from 100 cells.

Key Words

Chromatin immunoprecipitation ChIP histone acetylation methylation epigenetics 



Our work is supported by the FUGE, YFF, STAMCELLER, and STORFORSK programs of the Research Council of Norway and by the Norwegian Cancer Society.


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Copyright information

© Humana Press, a part of Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • John Arne Dahl
    • 1
  • Philippe Collas
    • 1
  1. 1.Department of BiochemistryInstitute of Basic Medical Sciences, University of OsloOsloNorway

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