Additional file 3.

Double antibody labelling Arp2/3 complex in filopodia. Antibodies to the Arp2/3 complex members p34-arc and arp2 both localise Arp2/3 complex to filopodia. Cells were spread on fibronectin for 60 minutes and co-labelled with a rabbit polyclonal antibody to p34-arc and a mouse monoclonal antibody to Arp2. B and D (scale bar 2 μm) are enlargements of boxed area in A and C (scale bar 10 μm) respectively.

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Johnston et al. BMC Cell Biology 2008 9:65   doi:10.1186/1471-2121-9-65