4B6M:
reference: The architecture of Trypanosoma brucei tubulin-binding cofactor B and implications for function., Fleming JR, Morgan RE, Fyfe PK, Kelly SM, Hunter WN, FEBS J. 2013 Apr 30. doi: 10.1111/febs.12308. PMID: 23627368

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