Emactuzumab (INN) (RG-7155) is a humanized monoclonal antibody designed for the treatment of cancer. It is currently in Phase I trials.'-mexi-' (melanoma): Ecromeximab§ Emactuzumab (INN) (RG-7155) is a humanized monoclonal antibody designed for the treatment of cancer. It is currently in Phase I trials. This drug was developed by Genentech/Roche.