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Quantitative flow cytometry analysis of HEK293 cells (A–B, mean fluorescence and % cells labeled), and lactate generation (C–D) after 24 h of culture with RITC-80M chitosan in media with different levels of serum (0%, 2%, 5%, 10%), exogenous lactate or EGF. 10-Hi: 10% heat-inactivated serum; 0-Lac, DMEM+7 mM lactate.
