Figure 3. Mesenchymal stem cells cultured in vitro. Mesenchymal stem cells cultured on day 3 (A; 10×) and day 5 (B; 10×). Immunofluorescent staining of CD29 was positive (red merged with DAPI; C; 20×); CD34 (D; 20×) and CD45 (E; 20×) were negative.