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Immunohistochemical detection of Cx43 are found in specialized plasma membrane regions of mouse cardiac myocytes, known as the intercalated disks. (A) H & E staining, ×200. (B) A longitudinal section, ×200. (C) A cross section, ×400. (D) A longitudinal section, arrows indicate intercalated disks, ×200. Bar=50 µm.
