3AH4:
reference: Sugar-binding sites of the HA1 subcomponent of Clostridium botulinum type C progenitor toxin., Nakamura T, Tonozuka T, Ide A, Yuzawa T, Oguma K, Nishikawa A, J Mol Biol. 2008 Feb 22;376(3):854-67. Epub 2007 Dec 23. PMID: 18178224

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