4xrn is a 4 chain structure with sequence from Pseudomonas aeruginosa PAO1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Remminghorst U, Rehm BH. Alg44, a unique protein required for alginate biosynthesis in Pseudomonas aeruginosa. FEBS Lett. 2006 Jul 10;580(16):3883-8. Epub 2006 Jun 16. PMID:16797016 doi:http://dx.doi.org/S0014-5793(06)00719-8