EOG8PVRCQ GO:0007165 5/92 signal transduction biological_process "The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell." [GOC:go_curators, GOC:mtg_signaling_feb11] EOG8PVRCQ GO:0004497 4/92 monooxygenase activity molecular_function "Catalysis of the incorporation of one atom from molecular oxygen into a compound and the reduction of the other atom of oxygen to water." [http://www.onelook.com/, ISBN:0198506732] EOG8PVRCQ GO:0005506 1/92 iron ion binding molecular_function "Interacting selectively and non-covalently with iron (Fe) ions." [GOC:ai] EOG8PVRCQ GO:0020037 1/92 heme binding molecular_function "Interacting selectively and non-covalently with heme, any compound of iron complexed in a porphyrin (tetrapyrrole) ring." [CHEBI:30413, GOC:ai] EOG8PVRCQ GO:0016705 1/92 oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen molecular_function "Catalysis of an oxidation-reduction (redox) reaction in which hydrogen or electrons are transferred from each of two donors, and molecular oxygen is reduced or incorporated into a donor." [GOC:mah]