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Transfection of OCT4 and SOX2 induces osteocalcin expression in fracture callus cartilage. Relative gene expression analysis of cartilage callus explants cultured in vitro in chondrogenic medium (white), osteogenic medium (gray), or chondrogenic medium with the OCT4-SOX2 transgene (black). Values are means±95% confidence. of n=6.
