1Z0H:
reference: N-terminal helix reorients in recombinant C-fragment of Clostridium botulinum type B., Jayaraman S, Eswaramoorthy S, Ahmed SA, Smith LA, Swaminathan S, Biochem Biophys Res Commun 2005 Apr 29;330(1):97-103. PMID: 15781237

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