<qa>  What is the recombinant DNA-derived humanized monoclonal antibody thatTrastuzumab Herceptin is a highly purified recombinant DNA-derived humanized monoclonal antibody that selectively binds with high affinity to the extracellular domain of the HER2 receptor. Results of this study showed survival in patients who received trastuzumab plus chemotherapy to be almost twice as long as chemotherapy alone 7.2 vs. 4.5 months, p0.0001. 