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As a result of the suppressed levels of catalase, there is an increased concentration of hydrogen peroxide, which can be further decomposed to hydroxyl radicals by a photochemical reaction (Schallreuter et al

Introduction Evolution by natural selection is the principle mechanism of adaptive biological change, the simplest yet most important theory in the life sciences

Although it is unclear how EGFR activation modulates GPx-1 activity, the increase in activity was rapid and peaked within 15 min, suggesting an event that required activation of existing GPx-1, possibly by phosphorylation or through alterations in proteinprotein interactions

In these models, we take into account the reaction geometry of common thiol-disulfide exchange reactions and distinguish hypothetical protein areas that might either interact with the disulfide substrate (a scaffold site) or the reducing agent (an activator site) (Fig