PRDX2,also named as TSA,PRP,NKEFB and TDPX1,belongs to the ahpC/TSA family. It is known to act as an antioxidant enzyme whose main function is H2O2 reduction in cells. PRDX2 is involved in redox regulation of the cell. It reduces peroxides with reducing equivalents provided through the thioredoxin system. It may play an important role in eliminating peroxides generated during metabolism. PRDX2 might participate in the signaling cascades of growth factors and tumor necrosis factor-alpha by regulating the intracellular concentrations of H2O2. PRDX2 actions may be related to the expression of NFKB and IKB.