(a)
(b)
(c)
(d)
Figure 4: Bone marrow-derived MSCs differentiating into adipocytes (a) and osteoblasts (b–d). Lipid droplets are visible in adipocytes (arrow, a) and mineralization: partly dark (unstained, b), and Alizarin Red-stained bright field (c) and phase-contrast (d) calcium deposits developed in osteoblasts.