2XH6:
reference: Structure of the Food-Poisoning Clostridium perfringens Enterotoxin Reveals Similarity to the Aerolysin-Like Pore-Forming Toxins., Briggs DC, Naylor CE, Smedley JG 3rd, Lukoyanova N, Robertson S, Moss DS, McClane BA, Basak AK, J Mol Biol. 2011 Oct 14;413(1):138-49. Epub 2011 Aug 3. PMID: 21839091

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