Approach used for studying protein–protein interactions analogous to immunoprecipitation, using (instead of antibody) one of the interacting proteins (the "bait") immobilised at a surface to capture the other protein (the "prey").
Source: PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1185 (https://doi.org/10.1515/pac-2016-1120)