“…Trxs have been found to possess a variety of biological functions, such as scavenging reactive oxygen species (ROS) (Das and Das, 2000), regeneration of oxidative-damage proteins (Fernando et al, 1992), regulation of gene expression, and controlling apoptosis as regulation of NF-κB transcription factor (Saitoh et al, 1998). Molecular studies have demonstrated that both Trx1 and Trx2 protect organisms against oxidative stress, and Trx1 is inducible in response to oxidative stress (Chen et al, 2002;Jikimoto et al, 2002). Recently, proteins containing the Trx-like active sites have also been identified in various species and classified as new members of the Trx superfamily (Matsuo et al, 2002;Comparative Biochemistry andPhysiology, Part C 154 (2011) 154-160 Nakamura, 2005;Carvalho et al, 2006).…”