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Cellular localization of GIRK4 in human left ventricle. Confocal images of human left ventricular epicardial (A) and endocardial section (C) stained for GIRK4 and Cx43. GIRK4 labelling was strongly present in intercalated discs, and present in t-tubules. In contrast, GIRK4 labelling was not detected in mid-myocardial sections (B). Cx43 was located in intercalated discs in all sections. Scale bar = 10 µm.
