Stained cryosections of a pellet culture and an alginate bead.

<p>Alcian blue stain of 8 µm Cryosections of an alginate bead culture (A) and an MSC pellet culture (B) after 21 days of chondrogenic differentiation. Proteoglycans show in blue. The gaps in the alginate bead section are artifacts from the cutting. The scale bar represents 500 µm.