Co-immunoprecipitation Assays

Co-immunoprecipitation is a well-established technique for determining whether two proteins interact. It is based on the principle that by pulling down one protein, you will also obtain any other proteins that exist in a complex with that protein. It is a relatively simple technique that does not require expensive reagents or materials. It is however, not without its limitations and some of these will be discussed here along with a step-by-step guide to performing and analyzing co-immunoprecipitation experiments.