image: The model cell developed in the lab of Christine D. Keating at Penn State uses as the cytoplasm a solution of two different polymers, PEG and dextran (Panel A). The image in Panel B is the ...

Over the past decade, enormous advances have been made in our understanding of the molecules that mediate the control of cell proliferation. Soluble mitogens, insoluble extracellular matrix (ECM) ...