High-Resolution Antibody-Antigen Complex Structure & Epitope Mapping. SARomics Biostructures' Contract Research Organization (CRO) team specializes in crystallization and structure determination of antibodies and antibody-antigen complexes, as well as high-resolution 3D mapping of epitopes and paratopes. Our services are enhanced by our FastLane list of extracellular proteins, which facilitates antibody-antigen complex crystallization, and by our proximity to the MAX IV synchrotron in Lund. High-resolution 3D paratope and epitope mapping, along with antibody mode of action analysis. Epitope definition to file a stronger IP. Identification and analysis of conformational changes and allosteric effects during antibody:antigen complex formation.