Phosphatidyl inositol‐4,5‐bisphosphate bound to bovine cardiac Na+/Ca2+ exchanger displays a MgATP regulation similar to that of the exchange fluxes

This work shows the existence of a phosphatidylinositol 4,5‐bisphosphate (PtdIns‐4,5‐P2) bound form of the cardiac sarcolemmal Na+/Ca2+ exchanger. That was demonstrated in Western blots and cross‐immunoprecipitation by using specific antibodies against the NCX1 exchanger (NCX1) and against PtdIns‐4,...

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