Field of study in proteomics studying protein interactions on different levels: protein-protein interactions (interactomics), the formation of protein complexes, and the interaction of proteins with other biomolecules.
Source: PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1156 (https://doi.org/10.1515/pac-2016-1120)