Figure 1.

Histochemical staining of adipose-derived stem cells subjected to chondrogenic, osteogenic, or adipogenic induction. The chondrogenic incduction was confirmed by Alcian blue staining of the chondrocyte-specific glucosaminoglycans. The osteogenic phenotype was revealed by staining with Alizarin red, which stains calcium-rich mineral deposits. For the adipogenic cells, intracellular accumulations of lipid droplets were stained with Oil red O.