has part realizes has specified input achieves_planned_objective role of has role chromatin evaluant role assay chromatin immunoprecipitation epigenetic modification identification objective protein and DNA interaction identification objective ChIP assay PMID: 6379641 Philippe Rocca-Serra url:https://en.wikipedia.org/wiki/Chromatin_immunoprecipitation An assay in which portions of chromatin, the ordered and organized complex of DNA and its interaction partners that make up a chormosome, is extracted and purified by immunoprecipitation with antibodies or tags, and subsequently analyzed chromatin immunoprecipitation assay Bjoern Peters ChIP assay ready for release