」 fon transportation F Fe3+→ ferritin Fe3+>transferrin-receptor(erythroblast) mitochondria protoporphyrin. heme ferritin Total iron-binding capacity(TIBC Serum iron(sD Transferrin saturation: SITIBC X100%=33935% Tansferrin receptorIron transportation Fe2+ → Fe3+ → ferritin Fe3+→transferrin→receptor (erythroblast) → mitochondria protoporphyrin heme ferritin Total iron-binding capacity(TIBC) Serum iron (SI) Transferrin saturation :SI/TIBC×100%＝33%~35% Tansferrin receptor