Chromatin immunoprecipitation (ChIP) coupled with high-throughput sequencing (ChIP-seq) is an invaluable method to profile of enrichment of histone modifications and transcription factor binding sites across the genome. However, standard ChIP-seq protocols require large numbers of cells (>107) as starting material, which are often impossible to obtain for rare immune populations. Here we describe a streamlined ChIP protocol optimised for small cell numbers in conjunction with transposon-tagging mediated sequencing library preparation (ChIPmentation) which allows the analysis of samples of as low as 105 cells.
Keywords: ChIP; ChIPmentation; Chromatin immunoprecipitation; Transcription factor.