1CA1:
reference: Structure of the key toxin in gas gangrene., Naylor CE, Eaton JT, Howells A, Justin N, Moss DS, Titball RW, Basak AK, Nat Struct Biol 1998 Aug;5(8):738-46. PMID: 9699639

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