Movie S2.

Microtubules provide delivery pathways for recycling Ca_V1.2 channels. TIRF time series obtained from a nocodazole-treated (10 μM for 2 h), AAV9-Ca_Vβ_2a-paGFP transduced ventricular myocyte. βAR activation with 100 nM ISO stimulated conspicuously fewer sarcolemmal channel insertions than that observed in control untreated cells.