NCIt definition : Human Oncogene HST is a mutated variant of FGF4 Gene (FGF Family) about 35 kb downstream
of INT2 (same orientation), which encodes Fibroblast Growth Factor 4, a heparin-binding
growth factor with homology to basic and acidic FGF. Gremlin relays an SHH signal
from the polarizing region to the apical ectodermal ridge. Formin-dependent activation
of BMP-antagonist Gremlin induces FGF4 and the SHH/FGF4 feedback loop. Oncogene HST
disrupts normal cell function.;