<p>RAW264.7 cells were treated as <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0103494#pone-0103494-g005" target="_blank">Fig. 5</a>. After incubation, the NO concentrations in the supernatant were detected by the A<sub>540</sub> value after reacting with Griess reagent. The data represent the means ± SD. *<i>p</i><0.05, **<i>p</i><0.01 compared with control. Each point represents the average of three independent experiments.</p