the inducing activity of two heparin binding growth factors hbgf-1 ( prostate epithelial cell growth factor ; acidic pi ) and hbgf-2 ( fibroblast growth factor ; basic pi ) from bovine brain has been tested on totipotent ectoderm from early amphibian ( xenopus laevis , ambystoma mexicanum ) embryos .
C0079349
heparin binding growth factors
C0016026
fibroblast growth factor