Fig. 2From: Effects of copper and cadmium on development and superoxide dismutase levels in horseshoe crab (Limulus polyphemus) embryosRelative amount of Cu/Zn SOD protein in Stage 20 Limulus polyphemus embryos exposed to Cu as determined by Western blotting. Data expressed as the mean ratio (±SE) of CuZn SOD in exposed animals relative to seawater controls (n = 2–4 replicate determinations). a 4 h, b 8 h, c 16 h, and d 24 h acute exposure to CuBack to article page