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Simplified schematic view of ERα and ERβ differential expression during asymmetric division and differentiation of villous trophoblast cells in vivo (postmitotic cell surface and cytoplasmic ERα expression – see ref. [15], is not included). pCT, parental CT; dC1T, differentiating CT; mST, mature ST; p, postmitotic parental cells; d, postmitotic daughter cells. Details in text.
