by using the radioactively labeled 1,4-dihydropyridine ( dhp ) probe , [ 3h ] pmd , we have demonstrated that cultured human embryonic fibroblasts grown at a low density in eagle 's medium supplemented with serum contain a single class of non-interacting dhp binding sites ( bmax , 1.2 +/- 0.3 pmol/10 ( 6 ) cells ; kd , 3.9 nm ) .
C0016030
fibroblasts
C0007634
cells