trxA Thioredoxin MAIVKVTDADFDSKVESGVQLVDFWATWCGPCKMIAPVLEELAADYEGKADILKLDVDENPSTAAKYEVMSIPTLIVFKDGQPVDKVVGFQPKENLAEVLDKHL Component of the thioredoxin-thioredoxin reductase system. Participates in various redox reactions through the reversible oxidation of its active center dithiol to a disulfide and catalyzes dithiol-disulfide exchange reactions (By similarity). 104 THIO_STAAU