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4l2a is a 2 chain structure with sequence from Pseudoalteromonas haloplanktis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Castellano I, Di Maro A, Ruocco MR, Chambery A, Parente A, Di Martino MT, Parlato G, Masullo M, De Vendittis E. Psychrophilic superoxide dismutase from Pseudoalteromonas haloplanktis: biochemical characterization and identification of a highly reactive cysteine residue. Biochimie. 2006 Oct;88(10):1377-89. Epub 2006 Apr 27. PMID:16713057 doi:http://dx.doi.org/S0300-9084(06)00055-1