Fig. 6

Antioxidant activity of the purified phycocyanin. ABTS assay was performed and radical scavenging activities (S%) are shown. The corresponding phycocyanin concentrations in PBS (phosphate-buffered saline) are shown. ABRG5-3 (blue), SK1-2-1 (red), NIES-39 (green), commercial Spirulina sample (light blue), or PBS only (yellow). The mean of the values obtained from three independent experiments is shown together with standard errors