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Glycogen storage capacity of hBMSCs at 21 days of differentiation. Top row: hBMSCs exposed to 25, 50, and 100 ng/mL of activin A. Bottom row: hBMSCs directly differentiated toward hepatocytes without actvin A. Glycogen stains magenta color. Original magnification of 4 × (scale bar 200 μm). Color images are available online.
