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Cellular localization of GIRK4 in rat heart. (A) Confocal images of rat atrial tissue section stained for GIRK4 and Cx43 show that GIRK4 labelling was strongly present in intercalated discs and present in the outer sarcolemma. (B) Confocal images of rat ventricular tissue section stained for GIRK4 and Cx43 show that GIRK4 labelling was present in intercalated discs. Cx43 was located in intercalated discs in both atrium and ventricle. Scale bar = 10 µm.
