using selective extraction reagents and non-penetrating probes , studies have been initiated on the molecular organization of substrate-attached material , adhesion sites which pinch off from the cell surface of normal balb/c 3t3 or sv40-transformed balb/c 3t3 ( svt2 ) cells and which remain bound to the serum-coated substrate during egta-mediated detachment of cells .
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cell surface of
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cells