Figure 1.
VASP is essential for actin-based motility of Listeria in platelet extracts. Actin structures formed by L. monocytogenes in: a and a′, mock-depleted platelet extract; b and b′, VASP-depleted extract (two cycles of depletion on anti-VASP–coated Dynabeads); c and c′, VASP-depleted extract supplemented with 1 μM bacterial recombinant VASP; d and d′, VASP-depleted extract supplemented with 0.9 μM eukaryotic recombinant VASP. (a–d) Phase-contrast; (a′–d′) corresponding rhodamine-actin fluorescence. Bar, 5 μm.