Catalysis of the reaction: thioredoxin + hydrogen peroxide = thioredoxin disulfide + H2O
1. MetaCyc RXN0-2672. Reactome: R-HSA-2161612 "PGH2 is reduced to PGF2a by FAM213B"
3. Reactome: R-HSA-3322995 "PRDX3,5 catalyze TXN2 reduced + H2O2 => TXN2 oxidized + 2H2O"
4. Reactome: R-HSA-3341343 "PRDX1,2,5 catalyze TXN reduced + H2O2 => TXN oxidized + 2H2O"
5. Reactome: R-HSA-3697882 "PRDX5 reduces peroxynitrite to nitrite using TXN"
6. Reactome: R-HSA-3697894 "PRDX5 reduces peroxynitrite to nitrite using TXN2"