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Epigenome Analysis of Pluripotent Stem Cells

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Mis-regulation of gene expression due to epigenetic abnormalities has been linked with complex genetic disorders, psychiatric illness, and cancer. In addition, the dynamic epigenetic changes that occur in pluripotent stem cells are believed to impact regulatory networks essential for proper lineage development. Chromatin immunoprecipitation (ChIP) is a technique used to enrich genomic fragments using antibodies against specific chromatin modifications, such as DNA-binding proteins or modified histones. Until recently, many ChIP protocols required large numbers of cells for each immunoprecipitation. This severely limited analysis of rare cell populations or post-mitotic, differentiated cell lines. Here, we describe a low cell number ChIP protocol with next generation sequencing and analysis that has the potential to uncover novel epigenetic regulatory pathways that were previously difficult or impossible to obtain.
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