maximal stimulation of chick embryo calvarial cell dna synthesis by bbe was equal to or exceeded maximal stimulation by nonosseous growth factors that have been reported to stimulate dna synthesis in bone organ cultures ( egf , fibroblast growth factor , platelet-derived growth factor , insulinlike growth factor i , and multiplication stimulating activity ) .
C0018284
growth factors
C0032200
platelet-derived growth factor