Biomissile Pharmaceuticals Co. Ltd. is developing multispecific antibodies that overcome resistance associated with antibody-drug conjugates via its next-generation natural killer (NK) cell engagers. “ADCs are very efficacious, but they do have a drawback with side effects and resistance, because ultimately ADCs are similar to chemotherapy because you bring toxins to the tumor site,” Biomissile co-founder and CEO Chao Tu told BioWorld.