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Adhesion of C. butyricum to HEK293 and HT-29 cell line. The live bacteria were fluorescently stained with SYTO9 and then incubated for 1h with HT-29 cells. The fluorescence intensity was measured with the microplate reader at 528nm. HEK293 cells was used as the control. Results are expressed as means and standard deviation of three independent experiments with **P < 0.01.
