HER1 (human epidermal growth factor receptor 1)

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The protein found on the surface of some cells and to which the epidermal growth factor binds, causing the cells to divide. This epidermal growth factor receptor is found at abnormally high levels on the surface of many types of cancer cells, and may be why these cells divide as actively as they do. Also known as EGFR or ErbB1.

Audio contributed by: Marisa Weiss, M.D.

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