3iwp is a 12 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑Li J, Ji C, Chen J, Yang Z, Wang Y, Fei X, Zheng M, Gu X, Wen G, Xie Y, Mao Y. Identification and characterization of a novel Cut family cDNA that encodes human copper transporter protein CutC. Biochem Biophys Res Commun. 2005 Nov 11;337(1):179-83. PMID:16182249 doi:https://dx.doi.org/10.1016/j.bbrc.2005.09.029
↑Li Y, Du J, Zhang P, Ding J. Crystal structure of human copper homeostasis protein CutC reveals a potential copper-binding site. J Struct Biol. 2010 Mar;169(3):399-405. doi: 10.1016/j.jsb.2009.10.012. Epub 2009, Oct 28. PMID:19878721 doi:https://dx.doi.org/10.1016/j.jsb.2009.10.012