Fig. 3: Rad52 droplet fusion can be promoted by flow-generating short nuclear microtubules.

a, b pti-DIM extension/shortening (a, white arrowhead) correlates with Rad52 droplet velocity (a, b). c–f CFD-based modelling of pti-DIM motion shows that it can generate flow that drives Rad52 droplet fusion when pti-DIM velocity is applied at ~90° (d) but not at 110° (e) relative to the axis connecting the centre of the droplets. Fusion is driven by an inter-droplet decrease in pressure that is shown in gradients (d, e) and quantifications (f). Scale bar, 1 µm.