Movie 4.

Spontaneous nucleocytoplasmic shuttling of endogenous GtaC. Spontaneous shuttling of mScarlet-I tagged GtaC during cell aggregation process is displayed in the left panel. The middle panel shows H2B labelled with miRFP670 for nucleus identification. Marged images in the right panel link GtaC shuttling with nuclear positions. Scale bars: 50 μm.