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Reduced cell proliferation in CHO/sS1E2 cells. A: Morphology of CHO and CHO/sS1E2 cells (original magnification 40 × ). B: Reduced 3H thymidine uptake by CHO/sS1E2 cells. CHO and CHO/sS1E2 cells were subjected to 3H thymidine uptake assay 24 h after seeding. Each sample was done in quadruplicates. The differences in 3H incorporation between CHO and CHO/sS1E2 cells were significant (P < 0.001).
