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Effects of the culture condition (absence of arginine in mono and co-culture) on nitrite release at 24 and 48 h of incubation. Each values represents the mean ± SE of 8 wells of 6 independent experiments. Significant differences (p < 0.05) among groups are labelled with asterisks. Significant differences (p < 0.05) between 24 and 48 h in the same group are indicated with hashtags.
