molecular function |
| GO:0051537 | | 2 iron, 2 sulfur cluster binding | | Interacting selectively and non-covalently with a 2 iron, 2 sulfur (2Fe-2S) cluster; this cluster consists of two iron atoms, with two inorganic sulfur atoms found between the irons and acting as bridging ligands. |
| GO:0009055 | | electron carrier activity | | Any molecular entity that serves as an electron acceptor and electron donor in an electron transport chain. An electron transport chain is a process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient. |
| GO:0051536 | | iron-sulfur cluster binding | | Interacting selectively and non-covalently with an iron-sulfur cluster, a combination of iron and sulfur atoms. |
| GO:0046872 | | metal ion binding | | Interacting selectively and non-covalently with any metal ion. |
biological process |
| GO:0022900 | | electron transport chain | | A process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient. |
| GO:0043158 | | heterocyst differentiation | | The process in which a relatively unspecialized cell acquires specialized features of a heterocyst, a differentiated cell in certain cyanobacteria whose purpose is to fix nitrogen. |
| GO:0009399 | | nitrogen fixation | | The process in which nitrogen is taken from its relatively inert molecular form (N2) in the atmosphere and converted into nitrogen compounds useful for other chemical processes, such as ammonia, nitrate and nitrogen dioxide. |
| GO:0055114 | | oxidation-reduction process | | A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons. |