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Analyzing transcription factor occupancy during embryo development using ChIP-seq.

Yad Ghavi-Helm and Eileen EM Furlong (2012)

Methods Mol Biol, 786:229-45.

Accurately assessing the binding of transcription factors to cis-regulatory elements in vivo is an essential step toward understanding the mechanisms that govern embryonic development. Genome-wide transcription factor location analysishas been facilitated by the development of high-density tiling arrays (ChIP-on-chip), and more recently by next-generation sequencing technologies, which are used to sequence the DNA fragments obtained from chromatin immunoprecipitation experiments (ChIP-seq). This chapter provides a detailed protocol of the different steps required to generate a successful ChIP-seq library, starting from embryo collection and fixation to chromatin preparation, immunoprecipitation, and finally library preparation. The protocol is optimized for Drosophila embryos, but can be adapted to any organism. The obtained libraryis suitable for sequencing on an Illumina GAIIx platform.

 
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