Fibroblast growth factors (FGFs) are among the best-studied heparin-binding
proteins, and heparan sulfate proteoglycans regulate FGF signalling by dir
ect molecular association with FGF and its tyrosine kinase receptor, FGFR.
Two recently determined crystal structures of FGF-FGFR-heparin complexes ha
ve provided new structural information on how heparin binds to FGF and FGFR
, and lead to different models for receptor dimerisation.