| umls-concept:C0085872 | skos:definition | GO: A thin sheet of proteoglycans and glycoproteins, especially laminin, secreted by cells as an extracellular matrix. [ISBN:0198547684],CSP: filamentous, ultramicroscopic layer that occurs at the base of epithelial cells and around muscle cells and nerve fibers; subdivision of basement membrane.,NCI: A layer of extracellular matrix found beneath epithelial tissues. It is secreted by epithelial cells and comprised of proteoglycans, laminin and type IV collagen. | lld:umls |
