<prompt> All are involved in iron metabolism except:HepcidinFerroportinTransthyretinCeruloplasmin  <response>: Ans. C. TransthyretinHepcidin is the regulator of iron homeostasis. Ferroprotin is their on exporter protein into circulation from intestinal cells. Ceruloplasmin has ferroxidase which convert Fe2 to Fe3 so it can serve the purpose of hephaestin in iron metabolism. Transthyretin is a transport protein for Thyroxine and Retinol. 