EOG8NZX8J GO:0016491 3/183 oxidoreductase activity molecular_function "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." [GOC:go_curators] EOG8NZX8J GO:0005737 2/183 cytoplasm cellular_component "All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures." [ISBN:0198547684] EOG8NZX8J GO:0018149 2/183 peptide cross-linking biological_process "The formation of a covalent cross-link between or within protein chains." [GOC:jsg]