http://purl.uniprot.org/keywords/84 | http://www.w3.org/2000/01/rdf-schema#comment | "Protein which is a component of the basement membrane, an extracellular matrix found under epithelial cells and around smooth and striated muscle cells. This matrix contains intrinsic macromolecular components such as collagen, laminin, and sulfated proteoglycans."xsd:string |