intact cell binding studies using [ 3h ] qnb ( a membrane-permeable ligand ) to measure total cellular ( internal plus cell surface ) machr and [ 3h ] n-methylscopolamine ( [ 3h ] nms , a membrane-impermeable ligand ) to measure cell surface machr were conducted to determine whether tunicamycin selectively depleted cell surface machr .
C0007634
cellular
C0699040
cell surface