Fig. 1From: Antioxidant and cytotoxic activities of three species of tropical seaweedsAntioxidant enzyme activities of methanolic extracts of P. tetrastromatica, C. racemosa and T. ornate for 8, 16 and 24 h. Untreated MCF-7 cells were used as the control and set as 100 %. Each value is expressed as mean ± SD (n = 3). a superoxide dismutase (SOD), b catalase (CAT), c glutathione reductase (GR). Note the enzyme activity decreasing upon treatmentBack to article page