“…Its polypeptide chain contains 192 residues, corresponding to a molecular mass of 21,251 Da. Paired sequence alignments indicated that PhSOD shares 77% amino acid identity with Fe-SOD from the cold-adapted bacterium Aliivibrio salmonicida (As-SOD), whose crystal structure was recently determined (Pedersen et al, 2009), and 69% amino acid identity with the mesophilic counterparts from Escherichia coli (EcSOD) (Lah et al, 1995) and Pseudomonas ovalis (PoSOD) (Ringe et al, 1983). Furthermore, 51% and 41% amino acid identity was found with the thermophilic SOD from Cyanobacterium thermosynecoccus elongatus (Kerfeld et al, 2003) and Sulfolobus solfataricus (SsSOD) (Dello Russo et al, 1997;Ursby et al, 1999), respectively.…”