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Inhibitory effect of HN on iNOS protein expression in LPS-induced RAW264.7 cells. iNOS and β-actin protein levels were determined by Western blotting. Data are mean ± SD (n = 3) of three independent experiments. ##P < 0.01, compared with the untreated control; *P < 0.05 and **P < 0.01, compared with the LPS-treated control
