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Here we investigate ERα and ERβ expression and regulation in vascular smooth muscle cells from mouse aorta. Immunocytochemistry showed nuclear staining for both ERα and ERβ. Double stainings revealed co-expression of ERα and ERβ in vascular smooth muscle cells. ERα (66 kDa) and ERβ (54 kDa) expression determined by Western blotting was unchanged within 7 h after inhibition of protein synthesis wit
