9z7s is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑Xie H, Zhang Y, Zhang P, Wang J, Wu Y, Wu X, Netoff T, Jiang Y. Functional study of NIPA2 mutations identified from the patients with childhood absence epilepsy. PLoS One. 2014 Oct 27;9(10):e109749. doi: 10.1371/journal.pone.0109749. , eCollection 2014. PMID:25347071 doi:https://dx.doi.org/10.1371/journal.pone.0109749