SEARCH Articles Figures Tables P -AR subtype-specific signaling in cardiac myocytes. Cav, caveolae GIRK, G protein coupled inwardly rectifying potassium channel If, nonselective cation channel NHERF, indicates NHERF EBP50 or arelated protein PLB, phospholamban PSD-95, indicates PSD-95 or a related protein TnC, troponin C TnT, troponin T. Dashed lines indicate postulated signaling pathways that have not been verified experimentally. [Publishers Imprint]