23444 hypothetical proteinThalassiosira pseudonana
GO:0004601 GO:0006979 -
Catalysis of the reaction: donor + hydrogen peroxide = oxidized donor + 2 H2O.
response to oxidative stress
Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of oxidative stress, a state often resulting from exposure to high levels of reactive oxygen species, e.g. superoxide anions, hydrogen peroxide (H2O2), and hydroxyl radicals.