results of cell surface radioimmunoassay and absorption analysis demonstrated that 81c6 defined a glioma-mesenchymal extracellular matrix ( gmem ) antigen expressed by 14 of 16 gliomas , 1 of 3 neuroblastomas , 1 of 7 melanomas , 2 of 6 sarcoma cell lines , and 8 of 9 cultured fibroblast lines .
C0699040
of cell surface
C0007634
cell