New qChIP‑MS technique maps DNA‑protein complexes in cells

Researchers at the Cancer Science Institute of Singapore (CSI Singapore) in collaboration with the National University of Singapore (NUS) have announced a new technique that enhances the study of DNA organization and regulation within cells. The method, named qChIP‑MS, was detailed in a paper published in *Nature Communications* on 26 May 2026 and represents a significant advance in chromatin research.

qChIP‑MS combines chromatin immunoprecipitation with mass spectrometry to map protein complexes that bind to specific DNA regions. By simultaneously capturing multiple proteins that co‑occupy a locus, the technique provides a clearer picture of how regulatory networks are assembled and maintained. The approach allows scientists to identify functional groups of proteins that act together, offering insights into the mechanisms that control gene expression and chromatin architecture.

The development of qChIP‑MS is expected to accelerate investigations into epigenetic regulation and disease mechanisms, particularly in cancer biology where aberrant protein-DNA interactions play a critical role. The method’s ability to resolve protein complexes at precise genomic sites could inform the design of targeted therapeutics and improve our understanding of how chromatin dynamics influence cellular behavior.