7qw3 is a 4 chain structure with sequence from Corallina pilulifera. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Garcia-Rodriguez E, Ohshiro T, Aibara T, Izumi Y, Littlechild J. Enhancing effect of calcium and vanadium ions on thermal stability of bromoperoxidase from Corallina pilulifera. J Biol Inorg Chem. 2005 May;10(3):275-82. Epub 2005 Mar 18. PMID:15776268 doi:10.1007/s00775-005-0639-3