To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1 Pharmacological analysis of the transmembrane action potential configuration in myoepithelial cells of the spontaneously beating heart of the ascidian Styela rustica in vitro Vladimir A. Golovko, Igor A. Kosevich, and Mikhail A. Gonotkov Journal of Experimental Biology 2017. 220:4589-4599; doi: 10.1242/jeb.154641 Download Original Video