| http://www.w3.org/ns/prov#value | - rming growth factor such as transforming growth factor-?? (TGF-??), a bone morphogenetic protein (BMP) such as BMP-2, ADMP-1, a hedgehog protein, an insulin-like growth factor, a platelet-derived growth factor, an interleukin, a colony-stimulating factor, and an activin.
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