in view of the fact that many , if not all cells , produce heparan sulfates and that these glycosaminoglycans are associated with the external surface of the cell and the ecm , a model is proposed suggesting that the neovascular response induced by tumours and some normal tissues may be mediated at least in part , by the initial release of heparinase-like enzymes rather than angiogenic factors ( fgfs ) per se .
C0007634
cells
C0699040
surface of