EQUINOX GRAPHICS / SCIENCE PHOTO LIBRARY EQUINOX GRAPHICS / SCIENCE PHOTO LIBRARY
Herceptin breast cancer drug, molecular model. Herceptin (Trastuzumab) is a monoclonal antibody that binds to the HER2 receptor (human epidermal growth factor receptor 2) on breast cancer cells, causing them to die during their reproductive cycle. Around a fifth of breast cancers are made up of cells that over-express this receptor, making them viable for Herceptin treatment. In this model the molecule's shape (secondary structure) is seen, comprising alpha helices (coils), beta sheets (arrows) and linking regions (lines).
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