multicellular spheroids of a human glioma cell line ( u-118 mg ) and a human thyroid cancer cell line ( hth -7 ) were analyzed for the presence of extracellular matrix ( ecm ) using light microscopy , transmission electron microscopy , and indirect immunofluorescence staining for fibronectin , laminin , and collagen .
C0015350
extracellular matrix
C0022984
laminin