Recombinant mouse monoclonal antibody Fab fragment expressed in CHO binding to human MS4A1. Technetium (99mTc) nofetumomab merpenta is a mouse monoclonal antibody used in the diagnosis of lung cancer, gastrointestinal, breast, ovary, pancreas, kidney, cervix, and bladder carcinoma. Learn more: Technetium (99MTC) Nofetumomab Merpentan