6FAM:
reference: Exploration of strategies for mechanism-based inhibitor design for family GH99 endo-alpha-1,2-mannanases., Fernandes PZ, Petricevic M, Sobala L, Davies GJ, Williams SJ, Chemistry. 2018 Mar 5. doi: 10.1002/chem.201800435. PMID: 29508463

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