>5ZZ6_1|Chains A, B, C, D|Redox-sensing transcriptional repressor Rex 1|Thermotoga maritima MSB8 (243274) MAEKIPKPVSKRLVSYYMCLERLLDEGVEVVSSEELARRLDLKASQIRKDLSYFGEFGKRGVGYNVEHLYDAIGEILGVKKEWKLVVVGAGNIGRAVANYTVMKEKGFRIIGIFDSDPSKIGKEAAPGLTVSDVSELEKFVEEHGVEIGVIAVPAEHAQEIAERLEKAGIKGILNFAPVKIKVSVPVENIDITASLRVLTFEIVRRNS