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Immunohistochemical detection of Cx43 of germ cell aplasia (Johnsen score 2.00). Staining for Cx43 was almost nonexistent in the seminiferous tubules of germ cell aplasia while strong signal of Cx43 was found on the plasma membrane of Leydig cells. (A) H & E staining, ×200. (B) ×200. (C) ×400. (D) Negative control, ×200. Bar=50 µm.
