Mupadolimab (Anti-NT5E / CD73) is a type II humanized immunoglobulin G1 (IgG1) monoclonal antibody targeting the ectoenzyme 5′-ecto-nucleotidase (cluster of differentiation 73; CD73; 5′-NT; ecto-5′-nucleotidase; NT5E), with potential immunomodulating and antineoplastic activities. MW: 145.5 kD.