5X7H:
reference: Isomaltooligosaccharide-binding structure of Paenibacillus sp. 598K cycloisomaltooligosaccharide glucanotransferase., Fujimoto Z, Kishine N, Suzuki N, Suzuki R, Mizushima D, Momma M, Kimura K, Funane K, Biosci Rep. 2017 Apr 6. pii: BSR20170253. doi: 10.1042/BSR20170253. PMID: 28385816

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).