RO7122290 is a bispecific antibody-like fusion protein composed of a trimeric ligand for the T-cell co-stimulatory receptor 4-1BB (CD137) and an antigen-binding fragment (Fab) targeting the tumor-associated protein fibroblast activation protein (FAP), with potential immunomodulatory and antitumor activities. It shows promise in the treatment of advanced solid tumors. Molecular weight: 177.78 KD.