Fig. 2. CTGF expression promotes the dynamic regulation of actin structures and focal contact sites in breast cancer cells. Distribution of F-actin and paxillin-containing focal adhesions in CTGF-induced morphological alterations. Serum-starved MCF-7/neo, MCF-7/CTGF, MDA231/neo, and MDA231/AS cells were fixed in 3.7% paraformaldehyde and photographed under a light microscope (a,e,i,m). The fixed cells were co-stained with Texas-Red-phalloidin for F-actin (red; b,f,j,n) and monoclonal antibody against paxillin (green; c,g,k,o). In overlays (d,h,c,p), arrows indicate the sites of paxillin, the borders of F-actin colocalization appear in yellow.