FIG. 5.
Expression of ECM proteins during EC morphogenesis. After 14 days in culture, HUVECs produced (A) fibronectin, (B) laminin, but not detectable amount of (C) collagen type I on 50-μm-wide stripes of PEG-RGDS. Secondary antibody controls with (D) anti-rabbit IgG and (E) anti-mouse IgG had minimal background signal. Scale bar = 200 μm.