So far, five distinct membrane FGFR have been identified in vertebrates and all of them belong to the tyrosine kinase superfamily (FGFR1 to FGFR4).
Do sada je identifikovano pet distinktnih membranskih FGFR proteina kod kičmenjaka i svi oni pripadaju superfamiliji tirozinskih kinaza (FGFR1 do FGFR4).