Movie 3.

Localization of actin, stained with SiR-Actin, in a THP1 macrophage undergoing efferocytic synapse formation on a supported lipid bilayer comprised of 20% phosphatidylserine and 80% phosphatidylcholine and opsonized with Gas6 and MFG-E8. Scale bar is 10 μm, 1 frame per minute.