The NKI Protein Facility started its activity as part of the Netherlands Cancer Institute (NKI) and provides support for the production, purification, characterisation and crystallisation of proteins. It is a National Facility supported by NKI and Netherlands Organisation for Scientific Research (NWO), and is accessible to both internal (NKI) and external research groups. Researchers who do not have previous experience in protein production and analysis can request for assistance with the design and performance of the experiments.