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The results presented here show for the first time that ER redistribution to the cytoplasm and its interaction with HER2 are important downstream effects of HER2 overexpression, that ERK1/2 is important for ER cytoplasmic localization, and that subcellular localization of ER may play a mechanistic role in determining the responsiveness of breast cancer cells to tamoxifen.
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Yang et al. (2004) studied this question.
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