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Gap junctions, assembled from connexins, form the cell-to-cell pathways for propagation of the precisely orchestrated patterns of current flow that govern the regular rhythm of the healthy heart. As in most tissues and organs, multiple connexin types are expressed in the heart; connexin43, connexin40 and connexin45 are found in distinctive combinations and relative quantities in different, functionally...
Objective: Intercellular coupling through gap junctions allows the morphologically and functionally heterogeneous sinoatrial node to synchronize and drive the atrial muscle. The purpose of this study was to identify the connexin isotypes expressed by sinoatrial node cells and to analyse the density of connexins in relation to cell size. Methods: Labeling for the different connexins using isotype-specific...
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