Fig. 2.
Histochemical analysis of cells infiltrating Matrigel plugs. Paraffin-embedded sections from Matrigel plugs induced by either bFGF alone or in conjunction with IL-12 were stained with rabbit anti–von Willebrand factor, mouse anti–alpha smooth muscle actin monoclonal antibody, or rat antimouse B220 monoclonal antibody and counterstained with hematoxylin. Staining for esterase used conventional methods. Original magnification ×40.