part of non-collagenous component of interstitial matrix extracellular protein-containing complex thrombospondin complex https://github.com/geneontology/go-ontology/issues/31065 2014-03-21T14:27:07Z bhm GO:1990341 A homotrimeric or homopentameric glycoprotein that functions at the interface of the cell membrane and the extracellular matrix through its interactions with proteins and proteoglycans, such as collagens, integrins and fibronectin, to regulate matrix structure and cellular behaviour. cellular_component