"Catalysis of the reaction: 2 peroxide radical + 2 H+ = O2 + H2O2 [goid 4784] [evidence IEA]; Interacting selectively with copper (Cu) ions [goid 5507] [evidence IEA]; Interacting selectively with zinc (Zn) ions [goid 8270] [evidence IEA]; Inhibition of the reactions brought about by dioxygen (O2) or peroxides. Usually the antioxidant is effective because it can itself be more easily oxidized than the substance protected. The term is often applied to components that can trap free radicals, thereby breaking the chain reaction that normally leads to extensive biological damage [goid 16209] [evidence IEA]; Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced [goid 16491] [evidence IEA]; Interacting selectively with any metal ion [goid 46872] [evidence IEA]; Catalysis of the reaction: 2 peroxide radical + 2 H+ = O2 + H2O2 [goid 4784] [pmid 15544046] [evidence IDA]; Catalysis of the reaction: 2 peroxide radical + 2 H+ = O2 + H2O2 [goid 4784] [pmid 17324120] [evidence IDA]; Interacting selectively with copper (Cu) ions [goid 5507] [pmid 17008312] [evidence IDA]; Interacting selectively with zinc (Zn) ions [goid 8270] [pmid 17381088] [evidence IDA]; Inhibition of the reactions brought about by dioxygen (O2) or peroxides. Usually the antioxidant is effective because it can itself be more easily oxidized than the substance protected. The term is often applied to components that can trap free radicals, thereby breaking the chain reaction that normally leads to extensive biological damage [goid 16209] [evidence IEA]; Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced [goid 16491] [evidence IEA]; Interacting selectively with the enzyme protein phosphatase 2B [goid 30346] [pmid 17324120] [evidence IDA]; Interacting selectively with an identical protein to form a homodimer [goid 42803] [pmid 10837872] [evidence NAS]; Interacting selectively with an identical protein to form a homodimer [goid 42803] [pmid 9726962] [evidence NAS]; Interacting selectively with any metal ion [goid 46872] [evidence IEA]; Interacting selectively with a chaperone protein, a class of proteins that bind to nascent or unfolded polypeptides and ensure correct folding or transport [goid 51087] [pmid 9726962] [evidence IPI]"