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Illustration showing a cancerous breast cell producing too many HER genes, which in turn produce an excessive number of HER2 receptors. The receptors attract growth factors, which stimulate the growth of more cells. Herceptin (generic name, trastuzumab) and other antibodies inhibit HER2 receptors and VEGF growth factors. The growth signal is green.
Close-up illustration showing a cancerous breast cell producing too many HER genes, which in turn produce an excessive number of HER2 receptors. The receptors attract growth factors, which stimulate the growth of more cells. Herceptin (generic name, trastuzumab) and other antibodies inhibit HER2 receptors and VEGF growth factors.