 A full-length representative protein would consist of an extracellular region, composed of three immunoglobulin-like domains, a single hydrophobic membrane-spanning segment and a cytoplasmic tyrosine kinase domain.The extracellular portion of the protein interacts with fibroblast growth factors, setting in motion a cascade of downstream signals which ultimately influence cell mitogenesis and differentiation.This particular family member binds both acidic and basic fibroblast growth factor and plays a role in bone development and maintenance.