CuZnSOD was identified from seahorse (HaCuZnSOD).
Optimum conditions for the antioxidant action may be pH 9 and 25 °C in seahorse.
An MTT assay and flow cytometry confirmed that rHaCuZnSOD showed peroxidase activity in the presence of HCO3−.
Transcriptional level of HaCuZnSOD was modulated by pathological stress.