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Alizarin staining and gene expression in bone morphogenetic protein 2 (BMP2)-treated chondrocyte culture and controls. Increased mineralization and expression of mineralization markers in BMP2-treated chondrocyte culture. Cells were treated with rhBMP2 for 14 days, qPCR was conducted, and bar graphs show relative gene expression. *P < 0.05. Scale bar = 10×.
