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Single plane confocal optical micrographs of fluorescently stained DCPA/CL, ACP/CL and HAP/CL particles (green) and osteoblastic MC3T3-E1 cells (cytoskeletal f-actin - red; nucleus - blue) following 7 days of incubation in differentiation medium. The sizes of the images are 270 × 270 µm.