Figure 3. PCNA staining of regenerating liver on postoperative day 4 following partial hepatectomy, the time of maximal endothelial cell proliferation (400×). (A) Preoperative liver. (B) Normal regenerating liver on postoperative day 4. (C) Regenerating liver treated with bFGF. (D) Regenerating liver treated with TNP-470. EC, endothelial cell; H, hepatocyte.