...Ian R. Kill; Sydney Shall ABSTRACT The characteristic limited reproductive life-span of normal human fibroblasts in culture is due to a steadily decreasing fraction of cells able to proliferate in the standard rich growth media. We have observed that restricting the growth factor supply to old...

... 1985 receptor-mediated endocytosis human fibroblasts a 2 -macroglobulin-gold. A number of compartments involved in receptor-mediated endocytosis have been described morphologically as well as biochemically. Using asialoglycoprotein or transferrin as a ligand, detailed information has...