Redox proteins are specialized proteins that facilitate oxidation-reduction (redox) reactions in biological systems. These reactions involve the transfer of electrons between molecules, which is crucial for various cellular processes, including energy production and metabolism. Common examples of redox proteins include cytochromes and flavoproteins, which play essential roles in the electron transport chain. These proteins often contain metal ions, such as iron or copper, that help in the electron transfer process. By participating in redox reactions, these proteins contribute to maintaining cellular homeostasis and regulating metabolic pathways, making them vital for the overall functioning of living organisms.