Fig. 7. Interactions of symbiotic partners in SOD expression. SOD isoforms of the whole symbiotic association (T), the cultured zooxanthellae (CZ) and the freshly isolated zooxanthellae (FIZ) of two symbiotic organism A. viridis (Mediterrannean sea anemone) and Stylophora pistillata (tropical scleractinian coral) have been revealed by 8% native PAGE and NBT staining. Each lane was loaded with 150 µg of protein. Arrows indicate pharmacological identification of bands: MnSOD (black arrows), CuZnSOD (open arrows) and FeSOD (grey arrows). These patterns were reproducible in four independent experiments on each species.