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The inhibitory effect of P. natalensis extracts on LPS-induced NO production (A) and % cell viability (B) on RAW 264.7 macrophages treated with different concentrations (10, 25 and 50 µg/mL) and positive controls; for Figure 1A: quercetin (50 µg/mL), N-Nitro-L-Arginine Methyl Ester (LNAME) (100 µM) and for Figure 1B: LNAME (25, 50 and 100 µM) and doxorubicin (4, 10 and 20 µM) over 24 h.
