1QMB:
reference: A 2.6 A structure of a serpin polymer and implications for conformational disease., Huntington JA, Pannu NS, Hazes B, Read RJ, Lomas DA, Carrell RW, J Mol Biol 1999 Oct 29;293(3):449-55. PMID: 10543942

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