>sp|Q03JN2|REX_STRTD Redox-sensing transcriptional repressor Rex OS=Streptococcus thermophilus GN=rex MTYEKNIPNATAKRLSLYYRIFKRFHRENIVKTSSKQIAEAIGIDPATVRRDFSYFGELG RRGFGYDVSKLMTFFAELLNDNATTKVALVGVGNIGRALLHYRFQERNRMQLVMAFDTDD NELVGSQTEDNIPIYGISQIKDKIAQEDIKTAILTVPSVKAQEVAELLVDAGIEGILCFS PVNLNLPRHVVLQYVDLTSELQTLLYFMKEEEKARRNND