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Immunostaining of β3 subunits in wild-type (WT) and Scn3b−/− myocytes. A single cardiac myocyte isolated from a WT heart showing the expression of β3 subunits in a striated pattern (a: left panel). This expression is absent in Scn3b−/− myocytes (b: left panel). The integrity of the cardiac myocytes is confirmed by the corresponding bright field images (a, b: right panels).
