Effects of extracellular iron concentration on calcium absorption and relationship between Ca2+ and cell apoptosis in Caco-2 cells

Figure 1 Epithelial cells in primary culture. A: Ingredients in the sediment after centrifugation (×200); B: colonies formed in cells cultured for 6 d (×100); C: pavement-like cells formed in cells cultured for 9 d (×200); D: immune positive cells (↑) (×400); E: no staining in negative group (×100); F: cell movement, adherent cells (▲) and just adherent cells (↓) (×100).