The query system for complexes aims to offer a search system of complexes comprising of both predicted and experimentally established structures of complexes, the former provided by the result of the CAPRI (Critical Assessment of PRedicted Interactions) experiment, while the latter provided by annotation of complexes provided in the PDB and EMDB data archives and value added data on complexes at PDBe . These complexes are composed of biomacromolecules e.g. protein–protein complexes, protein-nucleic acid complexes, or protein-sugar complexes. Designed complexes are also valid for the query system. Some of these complexes fall into the realm of integrative/hybrid methods, as they integrate experimental data from multiple methods. In CAPRI, additional data such as SAS profiles have been provided before
