[Somatic cell mutants with altered receptor and endocytosis activities]

Binding and endocytosis are responsible for cellular uptake of a wide variety of physiologically active ligands. We have selected somatic cell mutants with altered endocytosis activity for low-density lipoprotein, insulin, and epidermal growth factor. Of these mutants, the one with altered response to epidermal growth factor shows aberrant growth behavior in soft agar.