(a)
(b)
(c)
(d)
(e)
Figure 4: The expression of MSC markers in spheroid-forming cells and monolayer-cultured cells. The relative expression of CD105 (a), CD44 (b), CD29 (c), and KLF4 (e) was at close levels between spheroid-forming cells and monolayer-cultured cells, except for the individual observation time point. The relative expression of Sca-1 (d) showed a higher expression in spheroids than monolayer-cultured cells at all time points examined. Data are represented as the . (a, d, and e) . (b and c) . , , and .