hyroid hormone synthesis Basolateral membrane PLC-DAG SH) TSHR IP3 Apical membrane MP 2 Na* Ala+ NIS I(iodinated 1 PDS 2K+ DEHAL1 H2O2 NADP+ Na/K-ATPase 3 Nat. NADPH DUOX2 MIT DUOX2A DIT ? T iodinated Hydrolysis Capillary Colloidthyroid hormone synthesis