Figures 1B and 2C show that mPEG × HER2 and mPEG × DNS can both bind to the mPEG2K molecule but only mPEG × HER2 can specifically bind to HER2 antigen on the surface of HER2+ ovarian cancer cells (SKOV-3)(Fig. 1C). The gene discussed is ERBB2; the disease is ovarian carcinoma.