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Transdifferentiation of hypertrophic chondrocytes into osteogenic cells was induced in 14 day chick embryo femurs by cutting through the region of hypertrophic cartilage. The process was studied in organ culture, using electron microscopy, staining for alkaline phosphatase, immunocytochemistry of collagen type I and proliferative cell nuclear antigen, and in situ localization of DNA strand-breaks...
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