(a) Western blots of ErbB2, in SKBR3 cells at 72 hours after designated treatments. (1 = no treatment, 2 = lapatinib 0.2 micro-Molar, 3 = HER2-VIA (1:50), 4 = LacZ-VIA (1:50). (b) HER2-GFP transfected HEK293 cells were plated onto collagen-coated plastic dishes with glass bottoms and cultured overnight. Confocal images of cells expressing HER 2-GFP were acquired using Zeiss laser scanning microscopy (LSM-510). Cells were left untreated (top row) or treated for 1h with HER2-vaccine induced antibodies (HER2-VIA, bottom left), LacZ-vaccine induced antibodies (LacZ-VIA, bottom middle), or trastuzumab (bottom right). Representative images of three independent experiments are shown.