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3nxa is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Sturchler E, Cox JA, Durussel I, Weibel M, Heizmann CW. S100A16, a novel calcium-binding protein of the EF-hand superfamily. J Biol Chem. 2006 Dec 15;281(50):38905-17. Epub 2006 Oct 8. PMID:17030513 doi:10.1074/jbc.M605798200