| molecular function | 
|      | GO:0046872 |      | metal ion binding |      | Interacting selectively and non-covalently with any metal ion. | 
|      | GO:0005515 |      | protein binding |      | Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules). | 
  | biological process | 
|      | GO:0007155 |      | cell adhesion |      | The attachment of a cell, either to another cell or to an underlying substrate such as the extracellular matrix, via cell adhesion molecules. | 
|      | GO:0010668 |      | ectodermal cell differentiation |      | The process in which relatively unspecialized cells acquire specialized structural and/or functional features of an ectodermal cell. Differentiation includes the processes involved in commitment of a cell to a specific fate. | 
|      | GO:0030198 |      | extracellular matrix organization |      | A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of an extracellular matrix. | 
|      | GO:0007229 |      | integrin-mediated signaling pathway |      | A series of molecular signals initiated by the binding of extracellular ligand to an integrin on the surface of a target cell, and ending with regulation of a downstream cellular process, e.g. transcription. | 
|      | GO:0050900 |      | leukocyte migration |      | The movement of a leukocyte within or between different tissues and organs of the body. | 
|      | GO:0034142 |      | toll-like receptor 4 signaling pathway |      | Any series of molecular signals generated as a consequence of binding to toll-like receptor 4. | 
  | cellular component | 
|      | GO:0009986 |      | cell surface |      | The external part of the cell wall and/or plasma membrane. | 
|      | GO:0070062 |      | extracellular exosome |      | A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm. | 
|      | GO:0005615 |      | extracellular space |      | That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid. | 
|      | GO:0016021 |      | integral component of membrane |      | The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane. | 
|      | GO:0008305 |      | integrin complex |      | A protein complex that is composed of one alpha subunit and one beta subunit, both of which are members of the integrin superfamily of cell adhesion receptors; the complex spans the plasma membrane and binds to extracellular matrix ligands, cell-surface ligands, and soluble ligands. | 
|      | GO:0016020 |      | membrane |      | A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it. | 
|      | GO:0005886 |      | plasma membrane |      | The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins. |