FUNCTION: Displays thioredoxin reductase, glutaredoxin and glutathione reductase activities. Catalyzes disulfide bond isomerization. Promotes disulfide bond formation between GPX4 and various sperm proteins and may play a role in sperm maturation by promoting formation of sperm structural components...
                        FUNCTION: Displays thioredoxin reductase, glutaredoxin and glutathione reductase activities. Catalyzes disulfide bond isomerization. Promotes disulfide bond formation between GPX4 and various sperm proteins and may play a role in sperm maturation by promoting formation of sperm structural components (By similarity). {ECO:0000250|UniProtKB:Q99MD6}.
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                        GO - Biological processes (BP): 
                        cell differentiation [GO:0030154]; cell redox homeostasis [GO:0045454]; spermatogenesis [GO:0007283]...
                        cell differentiation [GO:0030154]; cell redox homeostasis [GO:0045454]; spermatogenesis [GO:0007283]
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                        GO - Molecular function (MF): 
                        flavin adenine dinucleotide binding [GO:0050660]; glutathione oxidoreductase activity [GO:0097573]; thioredoxin-disulfide reductase activity [GO:0004791]...
                        flavin adenine dinucleotide binding [GO:0050660]; glutathione oxidoreductase activity [GO:0097573]; thioredoxin-disulfide reductase activity [GO:0004791]
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                        GO - Cellular component (CC): 
                        cytoplasm [GO:0005737]; cytosol [GO:0005829]; endoplasmic reticulum [GO:0005783]; mitochondrion [GO:0005739]; nucleoplasm [GO:0005654]...
                        cytoplasm [GO:0005737]; cytosol [GO:0005829]; endoplasmic reticulum [GO:0005783]; mitochondrion [GO:0005739]; nucleoplasm [GO:0005654]
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